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 : #include "fd_quic_svc_q.h"
13 :
14 : #define FD_TEMPL_FRAME_CTX fd_quic_frame_ctx_t
15 : #include "templ/fd_quic_frame_handler_decl.h"
16 : #include "templ/fd_quic_frames_templ.h"
17 : #include "templ/fd_quic_undefs.h"
18 :
19 : #include "fd_quic_pretty_print.c"
20 :
21 : #include "crypto/fd_quic_crypto_suites.h"
22 : #include "templ/fd_quic_transport_params.h"
23 : #include "templ/fd_quic_parse_util.h"
24 : #include "tls/fd_quic_tls.h"
25 :
26 : #include <fcntl.h> /* for keylog open(2) */
27 : #include <unistd.h> /* for keylog close(2) */
28 :
29 : #include "../../ballet/hex/fd_hex.h"
30 : #include "../../tango/tempo/fd_tempo.h"
31 : #include "../../util/log/fd_dtrace.h"
32 :
33 : #include "../../disco/metrics/generated/fd_metrics_enums.h"
34 :
35 : /* Declare map type for stream_id -> stream* */
36 : #define MAP_NAME fd_quic_stream_map
37 76196557 : #define MAP_KEY stream_id
38 40608610 : #define MAP_T fd_quic_stream_map_t
39 49122605 : #define MAP_KEY_NULL FD_QUIC_STREAM_ID_UNUSED
40 33562492 : #define MAP_KEY_INVAL(key) ((key)==MAP_KEY_NULL)
41 : #define MAP_QUERY_OPT 1
42 : #include "../../util/tmpl/fd_map_dynamic.c"
43 :
44 :
45 : /* FD_QUIC_MAX_STREAMS_ALWAYS_UNLESS_ACKED */
46 : /* Defines whether a MAX_STREAMS frame is sent even if it was just */
47 : /* sent */
48 : /* They take very little space, and a dropped MAX_STREAMS frame can */
49 : /* be very consequential */
50 : /* Even when set, QUIC won't send this frame if the client has ackd */
51 : /* the most recent value */
52 12264 : # define FD_QUIC_MAX_STREAMS_ALWAYS_UNLESS_ACKED 0
53 :
54 : /* Construction API ***************************************************/
55 :
56 : FD_QUIC_API FD_FN_CONST ulong
57 4395 : fd_quic_align( void ) {
58 4395 : return FD_QUIC_ALIGN;
59 4395 : }
60 :
61 : /* fd_quic_footprint_ext returns footprint of QUIC memory region given
62 : limits. Also writes byte offsets to given layout struct. */
63 : static ulong
64 : fd_quic_footprint_ext( fd_quic_limits_t const * limits,
65 11040 : fd_quic_layout_t * layout ) {
66 11040 : memset( layout, 0, sizeof(fd_quic_layout_t) );
67 11040 : if( FD_UNLIKELY( !limits ) ) return 0UL;
68 :
69 11040 : ulong conn_cnt = limits->conn_cnt;
70 11040 : ulong conn_id_cnt = limits->conn_id_cnt;
71 11040 : ulong log_depth = limits->log_depth;
72 11040 : ulong handshake_cnt = limits->handshake_cnt;
73 11040 : ulong inflight_frame_cnt = limits->inflight_frame_cnt;
74 11040 : ulong tx_buf_sz = limits->tx_buf_sz;
75 11040 : ulong stream_pool_cnt = limits->stream_pool_cnt;
76 11040 : ulong inflight_res_cnt = limits->min_inflight_frame_cnt_conn * conn_cnt;
77 11040 : if( FD_UNLIKELY( conn_cnt ==0UL ) ) return 0UL;
78 11040 : if( FD_UNLIKELY( handshake_cnt ==0UL ) ) return 0UL;
79 11040 : if( FD_UNLIKELY( inflight_frame_cnt==0UL ) ) return 0UL;
80 :
81 11040 : if( FD_UNLIKELY( inflight_res_cnt > inflight_frame_cnt ) ) return 0UL;
82 :
83 11037 : if( FD_UNLIKELY( conn_id_cnt < FD_QUIC_MIN_CONN_ID_CNT ))
84 0 : return 0UL;
85 :
86 11037 : layout->meta_sz = sizeof(fd_quic_layout_t);
87 :
88 11037 : ulong offs = 0;
89 :
90 : /* allocate space for fd_quic_t */
91 11037 : offs += sizeof(fd_quic_t);
92 :
93 : /* allocate space for state */
94 11037 : offs = fd_ulong_align_up( offs, alignof(fd_quic_state_t) );
95 11037 : offs += sizeof(fd_quic_state_t);
96 :
97 : /* allocate space for connections */
98 11037 : offs = fd_ulong_align_up( offs, fd_quic_conn_align() );
99 11037 : layout->conns_off = offs;
100 11037 : ulong conn_footprint = fd_quic_conn_footprint( limits );
101 11037 : if( FD_UNLIKELY( !conn_footprint ) ) { FD_LOG_WARNING(( "invalid fd_quic_conn_footprint" )); return 0UL; }
102 11037 : layout->conn_footprint = conn_footprint;
103 11037 : ulong conn_foot_tot = conn_cnt * conn_footprint;
104 11037 : offs += conn_foot_tot;
105 :
106 : /* allocate space for conn IDs */
107 11037 : offs = fd_ulong_align_up( offs, fd_quic_conn_map_align() );
108 11037 : layout->conn_map_off = offs;
109 11037 : ulong slot_cnt_bound = (ulong)( FD_QUIC_DEFAULT_SPARSITY * (double)conn_cnt * (double)conn_id_cnt );
110 11037 : int lg_slot_cnt = fd_ulong_find_msb( slot_cnt_bound - 1 ) + 1;
111 11037 : layout->lg_slot_cnt = lg_slot_cnt;
112 11037 : ulong conn_map_footprint = fd_quic_conn_map_footprint( lg_slot_cnt );
113 11037 : if( FD_UNLIKELY( !conn_map_footprint ) ) { FD_LOG_WARNING(( "invalid fd_quic_conn_map_footprint" )); return 0UL; }
114 11037 : offs += conn_map_footprint;
115 :
116 : /* allocate space for handshake pool */
117 11037 : offs = fd_ulong_align_up( offs, fd_quic_tls_hs_pool_align() );
118 11037 : layout->hs_pool_off = offs;
119 11037 : ulong hs_pool_fp = fd_quic_tls_hs_pool_footprint( limits->handshake_cnt );
120 11037 : if( FD_UNLIKELY( !hs_pool_fp ) ) { FD_LOG_WARNING(( "invalid fd_quic_tls_hs_pool_footprint" )); return 0UL; }
121 11037 : offs += hs_pool_fp;
122 :
123 : /* allocate space for stream pool */
124 11037 : if( stream_pool_cnt && tx_buf_sz ) {
125 10992 : offs = fd_ulong_align_up( offs, fd_quic_stream_pool_align() );
126 10992 : layout->stream_pool_off = offs;
127 10992 : ulong stream_pool_footprint = fd_quic_stream_pool_footprint( stream_pool_cnt, tx_buf_sz );
128 10992 : if( FD_UNLIKELY( !stream_pool_footprint ) ) { FD_LOG_WARNING(( "invalid fd_quic_stream_pool_footprint" )); return 0UL; }
129 10989 : offs += stream_pool_footprint;
130 10989 : } else {
131 45 : layout->stream_pool_off = 0UL;
132 45 : }
133 :
134 : /* allocate space for pkt_meta_pool */
135 11034 : if( inflight_frame_cnt ) {
136 11034 : offs = fd_ulong_align_up( offs, fd_quic_pkt_meta_pool_align() );
137 11034 : layout->pkt_meta_pool_off = offs;
138 11034 : ulong pkt_meta_footprint = fd_quic_pkt_meta_pool_footprint( inflight_frame_cnt );
139 11034 : if( FD_UNLIKELY( !pkt_meta_footprint ) ) { FD_LOG_WARNING(( "invalid fd_quic_pkt_meta_pool_footprint" )); return 0UL; }
140 11034 : offs += pkt_meta_footprint;
141 11034 : } else {
142 0 : layout->pkt_meta_pool_off = 0UL;
143 0 : }
144 :
145 : /* allocate space for quic_log_buf */
146 11034 : offs = fd_ulong_align_up( offs, fd_quic_log_buf_align() );
147 11034 : layout->log_off = offs;
148 11034 : ulong log_footprint = fd_quic_log_buf_footprint( log_depth );
149 11034 : if( FD_UNLIKELY( !log_footprint ) ) { FD_LOG_WARNING(( "invalid fd_quic_log_buf_footprint for depth %lu", log_depth )); return 0UL; }
150 11034 : offs += log_footprint;
151 :
152 : /* allocate space for service timers */
153 11034 : offs = fd_ulong_align_up( offs, fd_quic_svc_timers_align() );
154 11034 : layout->svc_timers_off = offs;
155 11034 : ulong svc_timers_footprint = fd_quic_svc_timers_footprint( limits->conn_cnt );
156 11034 : if( FD_UNLIKELY( !svc_timers_footprint ) ) { FD_LOG_WARNING(( "invalid fd_quic_svc_timers_footprint" )); return 0UL; }
157 11034 : offs += svc_timers_footprint;
158 :
159 11034 : return offs;
160 11034 : }
161 :
162 : FD_QUIC_API ulong
163 2184 : fd_quic_footprint( fd_quic_limits_t const * limits ) {
164 2184 : fd_quic_layout_t layout;
165 2184 : return fd_quic_footprint_ext( limits, &layout );
166 2184 : }
167 :
168 : FD_QUIC_API void *
169 : fd_quic_new( void * mem,
170 2142 : fd_quic_limits_t const * limits ) {
171 :
172 : /* Argument checks */
173 :
174 2142 : if( FD_UNLIKELY( !mem ) ) {
175 0 : FD_LOG_WARNING(( "NULL mem" ));
176 0 : return NULL;
177 0 : }
178 :
179 2142 : ulong align = fd_quic_align();
180 2142 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)mem, align ) ) ) {
181 0 : FD_LOG_WARNING(( "misaligned mem" ));
182 0 : return NULL;
183 0 : }
184 :
185 2142 : if( FD_UNLIKELY( !limits ) ) {
186 0 : FD_LOG_WARNING(( "NULL limits" ));
187 0 : return NULL;
188 0 : }
189 :
190 2142 : if( FD_UNLIKELY( ( limits->conn_cnt ==0UL )
191 2142 : | ( limits->conn_cnt >=UINT_MAX )
192 2142 : | ( limits->handshake_cnt ==0UL )
193 2142 : | ( limits->inflight_frame_cnt==0UL ) ) ) {
194 0 : FD_LOG_WARNING(( "invalid limits" ));
195 0 : return NULL;
196 0 : }
197 :
198 2142 : fd_quic_layout_t layout;
199 2142 : ulong footprint = fd_quic_footprint_ext( limits, &layout );
200 2142 : if( FD_UNLIKELY( !footprint ) ) {
201 3 : FD_LOG_WARNING(( "invalid footprint for config" ));
202 3 : return NULL;
203 3 : }
204 :
205 2139 : fd_quic_t * quic = (fd_quic_t *)mem;
206 :
207 : /* Clear fd_quic_t memory region */
208 2139 : fd_memset( quic, 0, footprint );
209 :
210 : /* Defaults */
211 2139 : quic->config.idle_timeout = FD_QUIC_DEFAULT_IDLE_TIMEOUT;
212 2139 : quic->config.ack_delay = FD_QUIC_DEFAULT_ACK_DELAY;
213 2139 : quic->config.retry_ttl = FD_QUIC_DEFAULT_RETRY_TTL;
214 2139 : quic->config.tls_hs_ttl = FD_QUIC_DEFAULT_TLS_HS_TTL;
215 :
216 : /* Copy layout descriptors */
217 2139 : quic->limits = *limits;
218 2139 : quic->layout = layout;
219 :
220 : /* Init log buffer (persists across init calls) */
221 2139 : void * shmlog = (void *)( (ulong)quic + quic->layout.log_off );
222 2139 : if( FD_UNLIKELY( !fd_quic_log_buf_new( shmlog, limits->log_depth ) ) ) {
223 0 : return NULL;
224 0 : }
225 :
226 2139 : FD_COMPILER_MFENCE();
227 2139 : quic->magic = FD_QUIC_MAGIC;
228 2139 : FD_COMPILER_MFENCE();
229 :
230 2139 : return quic;
231 2139 : }
232 :
233 : FD_QUIC_API fd_quic_limits_t *
234 : fd_quic_limits_from_env( int * pargc,
235 : char *** pargv,
236 0 : fd_quic_limits_t * limits ) {
237 :
238 0 : if( FD_UNLIKELY( !limits ) ) return NULL;
239 :
240 0 : limits->conn_cnt = fd_env_strip_cmdline_ulong( pargc, pargv, "--quic-conns", "QUIC_CONN_CNT", 512UL );
241 0 : limits->conn_id_cnt = fd_env_strip_cmdline_ulong( pargc, pargv, "--quic-conn-ids", "QUIC_CONN_ID_CNT", 16UL );
242 0 : limits->stream_pool_cnt = fd_env_strip_cmdline_uint ( pargc, pargv, "--quic-streams", "QUIC_STREAM_CNT", 8UL );
243 0 : limits->handshake_cnt = fd_env_strip_cmdline_uint ( pargc, pargv, "--quic-handshakes", "QUIC_HANDSHAKE_CNT", 512UL );
244 0 : limits->inflight_frame_cnt = fd_env_strip_cmdline_ulong( pargc, pargv, "--quic-inflight-pkts", "QUIC_MAX_INFLIGHT_PKTS", 2500UL );
245 0 : limits->tx_buf_sz = fd_env_strip_cmdline_ulong( pargc, pargv, "--quic-tx-buf-sz", "QUIC_TX_BUF_SZ", 4096UL );
246 :
247 0 : return limits;
248 0 : }
249 :
250 : FD_QUIC_API fd_quic_config_t *
251 : fd_quic_config_from_env( int * pargc,
252 : char *** pargv,
253 0 : fd_quic_config_t * cfg ) {
254 :
255 0 : if( FD_UNLIKELY( !cfg ) ) return NULL;
256 :
257 0 : char const * keylog_file = fd_env_strip_cmdline_cstr( pargc, pargv, NULL, "SSLKEYLOGFILE", NULL );
258 0 : long idle_timeout_ms = fd_env_strip_cmdline_long( pargc, pargv, "--idle-timeout", NULL, 3000UL );
259 0 : ulong initial_rx_max_stream_data = fd_env_strip_cmdline_ulong(
260 0 : pargc,
261 0 : pargv,
262 0 : "--quic-initial-rx-max-stream-data",
263 0 : "QUIC_INITIAL_RX_MAX_STREAM_DATA",
264 0 : FD_QUIC_DEFAULT_INITIAL_RX_MAX_STREAM_DATA
265 0 : );
266 0 : cfg->retry = fd_env_strip_cmdline_contains( pargc, pargv, "--quic-retry" );
267 :
268 0 : if( keylog_file ) {
269 0 : strncpy( cfg->keylog_file, keylog_file, FD_QUIC_PATH_LEN );
270 0 : } else {
271 0 : cfg->keylog_file[0]='\0';
272 0 : }
273 :
274 0 : cfg->idle_timeout = idle_timeout_ms * (long)1e6;
275 0 : cfg->initial_rx_max_stream_data = initial_rx_max_stream_data;
276 :
277 0 : return cfg;
278 0 : }
279 :
280 : FD_QUIC_API fd_aio_t const *
281 42 : fd_quic_get_aio_net_rx( fd_quic_t * quic ) {
282 42 : fd_aio_new( &quic->aio_rx, quic, fd_quic_aio_cb_receive );
283 42 : return &quic->aio_rx;
284 42 : }
285 :
286 : FD_QUIC_API void
287 : fd_quic_set_aio_net_tx( fd_quic_t * quic,
288 3414 : fd_aio_t const * aio_tx ) {
289 :
290 3414 : if( aio_tx ) {
291 3372 : quic->aio_tx = *aio_tx;
292 3372 : } else {
293 42 : memset( &quic->aio_tx, 0, sizeof(fd_aio_t) );
294 42 : }
295 3414 : }
296 :
297 : /* initialize everything that mutates during runtime */
298 : static void
299 13534658 : fd_quic_stream_init( fd_quic_stream_t * stream ) {
300 13534658 : stream->context = NULL;
301 :
302 13534658 : stream->tx_buf.head = 0;
303 13534658 : stream->tx_buf.tail = 0;
304 13534658 : stream->tx_sent = 0;
305 :
306 13534658 : stream->stream_flags = 0;
307 : /* don't update next here, since it's still in use */
308 :
309 13534658 : stream->state = 0;
310 :
311 13534658 : stream->tx_max_stream_data = 0;
312 13534658 : stream->tx_tot_data = 0;
313 :
314 13534658 : stream->rx_tot_data = 0;
315 :
316 13534658 : stream->upd_pkt_number = 0;
317 13534658 : }
318 :
319 : FD_QUIC_API fd_quic_t *
320 2139 : fd_quic_join( void * shquic ) {
321 :
322 2139 : if( FD_UNLIKELY( !shquic ) ) {
323 0 : FD_LOG_WARNING(( "null shquic" ));
324 0 : return NULL;
325 0 : }
326 2139 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)shquic, FD_QUIC_ALIGN ) ) ) {
327 0 : FD_LOG_WARNING(( "misaligned quic" ));
328 0 : return NULL;
329 0 : }
330 :
331 2139 : fd_quic_t * quic = (fd_quic_t *)shquic;
332 2139 : if( FD_UNLIKELY( quic->magic != FD_QUIC_MAGIC ) ) {
333 0 : FD_LOG_WARNING(( "bad magic" ));
334 0 : return NULL;
335 0 : }
336 :
337 2139 : return quic;
338 2139 : }
339 :
340 : FD_QUIC_API void *
341 2136 : fd_quic_leave( fd_quic_t * quic ) {
342 2136 : return (void *)quic;
343 2136 : }
344 :
345 : FD_QUIC_API fd_quic_t *
346 3390 : fd_quic_init( fd_quic_t * quic ) {
347 :
348 3390 : fd_quic_limits_t const * limits = &quic->limits;
349 3390 : fd_quic_config_t * config = &quic->config;
350 :
351 3390 : if( FD_UNLIKELY( !config->role ) ) { FD_LOG_WARNING(( "cfg.role not set" )); return NULL; }
352 3390 : if( FD_UNLIKELY( !config->idle_timeout ) ) { FD_LOG_WARNING(( "zero cfg.idle_timeout" )); return NULL; }
353 3390 : if( FD_UNLIKELY( !config->ack_delay ) ) { FD_LOG_WARNING(( "zero cfg.ack_delay" )); return NULL; }
354 3390 : if( FD_UNLIKELY( !config->retry_ttl ) ) { FD_LOG_WARNING(( "zero cfg.retry_ttl" )); return NULL; }
355 :
356 3390 : do {
357 3390 : ulong x = 0U;
358 111870 : for( ulong i=0UL; i<32UL; i++ ) x |= quic->config.identity_public_key[i];
359 :
360 3390 : if( FD_UNLIKELY( !x ) ) {
361 0 : FD_LOG_WARNING(( "cfg.identity_public_key not set" ));
362 0 : return NULL;
363 0 : }
364 3390 : } while(0);
365 :
366 3390 : switch( config->role ) {
367 2094 : case FD_QUIC_ROLE_SERVER:
368 3390 : case FD_QUIC_ROLE_CLIENT:
369 3390 : break;
370 0 : default:
371 0 : FD_LOG_WARNING(( "invalid cfg.role" ));
372 0 : return NULL;
373 3390 : }
374 :
375 3390 : if( FD_UNLIKELY( !config->ack_threshold ) ) {
376 6 : config->ack_threshold = FD_QUIC_DEFAULT_ACK_THRESHOLD;
377 6 : }
378 :
379 3390 : fd_quic_layout_t layout = {0};
380 3390 : if( FD_UNLIKELY( !fd_quic_footprint_ext( &quic->limits, &layout ) ) ) {
381 0 : FD_LOG_CRIT(( "fd_quic_footprint_ext failed" ));
382 0 : }
383 3390 : if( FD_UNLIKELY( 0!=memcmp( &layout, &quic->layout, sizeof(fd_quic_layout_t) ) ) ) {
384 0 : FD_LOG_HEXDUMP_WARNING(( "saved layout", &quic->layout, sizeof(fd_quic_layout_t) ));
385 0 : FD_LOG_HEXDUMP_WARNING(( "derived layout", &layout, sizeof(fd_quic_layout_t) ));
386 0 : FD_LOG_CRIT(( "fd_quic_layout changed. Memory corruption?" ));
387 0 : }
388 :
389 : /* Reset state */
390 :
391 3390 : fd_quic_state_t * state = fd_quic_get_state( quic );
392 3390 : memset( state, 0, sizeof(fd_quic_state_t) );
393 :
394 3390 : void * shmlog = (void *)( (ulong)quic + layout.log_off );
395 3390 : if( FD_UNLIKELY( !fd_quic_log_tx_join( state->log_tx, shmlog ) ) ) {
396 0 : FD_LOG_CRIT(( "fd_quic_log_tx_join failed, indicating memory corruption" ));
397 0 : }
398 :
399 : /* State: Initialize packet meta pool */
400 3390 : if( layout.pkt_meta_pool_off ) {
401 3390 : ulong pkt_meta_cnt = limits->inflight_frame_cnt;
402 3390 : ulong pkt_meta_laddr = (ulong)quic + layout.pkt_meta_pool_off;
403 3390 : fd_quic_pkt_meta_t * pkt_meta_pool = fd_quic_pkt_meta_pool_new( (void*)pkt_meta_laddr, pkt_meta_cnt );
404 3390 : state->pkt_meta_pool = fd_quic_pkt_meta_pool_join( pkt_meta_pool );
405 3390 : fd_quic_pkt_meta_ds_init_pool( pkt_meta_pool, pkt_meta_cnt );
406 3390 : }
407 :
408 : /* State: initialize each connection, and add to free list */
409 :
410 3390 : ulong conn_laddr = (ulong)quic + layout.conns_off;
411 :
412 : /* used for indexing */
413 3390 : state->conn_base = conn_laddr;
414 3390 : state->conn_sz = layout.conn_footprint;
415 :
416 : /* initialize free_conns */
417 3390 : state->free_conn_list = 0;
418 :
419 3390 : fd_quic_conn_t _catch[1] = {{.conn_idx = UINT_MAX }};
420 3390 : fd_quic_conn_t * last = _catch;
421 320172 : for( ulong j = 0; j < limits->conn_cnt; ++j ) {
422 316782 : void * conn_mem = (void *)( conn_laddr );
423 316782 : conn_laddr += layout.conn_footprint;
424 :
425 316782 : fd_quic_conn_t * conn = fd_quic_conn_new( conn_mem, quic, limits );
426 316782 : if( FD_UNLIKELY( !conn ) ) {
427 0 : FD_LOG_WARNING(( "NULL conn" ));
428 0 : return NULL;
429 0 : }
430 :
431 : /* used for indexing */
432 316782 : conn->conn_idx = (uint)j;
433 316782 : conn->free_conn_next = UINT_MAX;
434 :
435 : /* add to free list */
436 316782 : last->free_conn_next = (uint)j;
437 :
438 316782 : last = conn;
439 316782 : }
440 :
441 : /* State: Initialize conn ID map */
442 :
443 3390 : ulong conn_map_laddr = (ulong)quic + layout.conn_map_off;
444 3390 : state->conn_map = fd_quic_conn_map_join( fd_quic_conn_map_new( (void *)conn_map_laddr, layout.lg_slot_cnt ) );
445 3390 : if( FD_UNLIKELY( !state->conn_map ) ) {
446 0 : FD_LOG_WARNING(( "NULL conn_map" ));
447 0 : return NULL;
448 0 : }
449 :
450 : /* State: Initialize service queue */
451 3390 : ulong svc_base = (ulong)quic + layout.svc_timers_off;
452 3390 : state->svc_timers = fd_quic_svc_timers_init( (void *)svc_base, limits->conn_cnt, state );
453 :
454 : /* Check TX AIO */
455 :
456 3390 : if( FD_UNLIKELY( !quic->aio_tx.send_func ) ) {
457 0 : FD_LOG_WARNING(( "NULL aio_tx" ));
458 0 : return NULL;
459 0 : }
460 :
461 : /* State: Initialize TLS */
462 :
463 3390 : fd_quic_tls_cfg_t tls_cfg = {
464 3390 : .max_concur_handshakes = limits->handshake_cnt,
465 :
466 : /* set up callbacks */
467 3390 : .secret_cb = fd_quic_tls_cb_secret,
468 3390 : .handshake_complete_cb = fd_quic_tls_cb_handshake_complete,
469 3390 : .peer_params_cb = fd_quic_tls_cb_peer_params,
470 :
471 3390 : .signer = {
472 3390 : .ctx = config->sign_ctx,
473 3390 : .sign_fn = config->sign,
474 3390 : },
475 :
476 3390 : .cert_public_key = quic->config.identity_public_key,
477 3390 : };
478 :
479 : /* State: Initialize handshake pool */
480 :
481 3390 : if( FD_UNLIKELY( !fd_quic_tls_new( state->tls, &tls_cfg ) ) ) {
482 0 : FD_DEBUG( FD_LOG_WARNING( ( "fd_quic_tls_new failed" ) ) );
483 0 : return NULL;
484 0 : }
485 :
486 3390 : ulong hs_pool_laddr = (ulong)quic + layout.hs_pool_off;
487 3390 : 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 ) );
488 3390 : if( FD_UNLIKELY( !hs_pool ) ) {
489 0 : FD_LOG_WARNING(( "fd_quic_tls_hs_pool_new failed" ));
490 0 : return NULL;
491 0 : }
492 3390 : state->hs_pool = hs_pool;
493 :
494 : /* State: Initialize TLS handshake cache */
495 3390 : if( FD_UNLIKELY( !fd_quic_tls_hs_cache_join( fd_quic_tls_hs_cache_new( &state->hs_cache ) ) ) ) {
496 0 : FD_LOG_WARNING(( "fd_quic_tls_hs_cache_new failed" ));
497 0 : return NULL;
498 0 : }
499 :
500 :
501 3390 : if( layout.stream_pool_off ) {
502 3381 : ulong stream_pool_cnt = limits->stream_pool_cnt;
503 3381 : ulong tx_buf_sz = limits->tx_buf_sz;
504 3381 : ulong stream_pool_laddr = (ulong)quic + layout.stream_pool_off;
505 3381 : state->stream_pool = fd_quic_stream_pool_new( (void*)stream_pool_laddr, stream_pool_cnt, tx_buf_sz );
506 3381 : }
507 :
508 : /* generate a secure random number as seed for fd_rng */
509 3390 : uint rng_seed = 0;
510 3390 : int rng_seed_ok = !!fd_rng_secure( &rng_seed, sizeof(rng_seed) );
511 3390 : if( FD_UNLIKELY( !rng_seed_ok ) ) {
512 0 : FD_LOG_ERR(( "fd_rng_secure failed" ));
513 0 : }
514 3390 : fd_rng_new( state->_rng, rng_seed, 0UL );
515 :
516 : /* use rng to generate secret bytes for future RETRY token generation */
517 3390 : int rng1_ok = !!fd_rng_secure( state->retry_secret, FD_QUIC_RETRY_SECRET_SZ );
518 3390 : int rng2_ok = !!fd_rng_secure( state->retry_iv, FD_QUIC_RETRY_IV_SZ );
519 3390 : if( FD_UNLIKELY( !rng1_ok || !rng2_ok ) ) {
520 0 : FD_LOG_ERR(( "fd_rng_secure failed" ));
521 0 : return NULL;
522 0 : }
523 :
524 : /* Initialize transport params */
525 :
526 3390 : fd_quic_transport_params_t * tp = &state->transport_params;
527 :
528 : /* initial max streams is zero */
529 : /* we will send max_streams and max_data frames later to allow the peer to */
530 : /* send us data */
531 3390 : ulong initial_max_streams_uni = quic->config.role==FD_QUIC_ROLE_SERVER ? 1UL<<60 : 0;
532 3390 : ulong initial_max_stream_data = config->initial_rx_max_stream_data;
533 :
534 3390 : long max_ack_delay_ns = config->ack_delay * 2L;
535 3390 : long max_ack_delay_ms = max_ack_delay_ns / (long)1e6;
536 :
537 3390 : long idle_timeout_ns = config->idle_timeout;
538 3390 : long idle_timeout_ms = idle_timeout_ns / (long)1e6;
539 :
540 3390 : memset( tp, 0, sizeof(fd_quic_transport_params_t) );
541 3390 : FD_QUIC_TRANSPORT_PARAM_SET( tp, max_idle_timeout_ms, (ulong)idle_timeout_ms );
542 3390 : FD_QUIC_TRANSPORT_PARAM_SET( tp, max_udp_payload_size, FD_QUIC_MAX_PAYLOAD_SZ ); /* TODO */
543 3390 : FD_QUIC_TRANSPORT_PARAM_SET( tp, initial_max_data, (1UL<<62)-1UL );
544 3390 : FD_QUIC_TRANSPORT_PARAM_SET( tp, initial_max_stream_data_uni, initial_max_stream_data );
545 3390 : FD_QUIC_TRANSPORT_PARAM_SET( tp, initial_max_streams_bidi, 0 );
546 3390 : FD_QUIC_TRANSPORT_PARAM_SET( tp, initial_max_streams_uni, initial_max_streams_uni );
547 3390 : FD_QUIC_TRANSPORT_PARAM_SET( tp, ack_delay_exponent, 0 );
548 3390 : FD_QUIC_TRANSPORT_PARAM_SET( tp, max_ack_delay, (ulong)max_ack_delay_ms );
549 3390 : /* */tp->disable_active_migration_present = 1;
550 :
551 : /* Compute max inflight pkt cnt per conn */
552 3390 : state->max_inflight_frame_cnt_conn = limits->inflight_frame_cnt - limits->min_inflight_frame_cnt_conn * (limits->conn_cnt-1);
553 :
554 3390 : return quic;
555 3390 : }
556 :
557 : /* fd_quic_enc_level_to_pn_space maps of encryption level in [0,4) to
558 : packet number space. */
559 : static uint
560 41390838 : fd_quic_enc_level_to_pn_space( uint enc_level ) {
561 : /* TODO improve this map */
562 41390838 : static uchar const el2pn_map[] = { 0, 2, 1, 2 };
563 :
564 41390838 : if( FD_UNLIKELY( enc_level >= 4U ) )
565 0 : FD_LOG_ERR(( "fd_quic_enc_level_to_pn_space called with invalid enc_level" ));
566 :
567 41390838 : return el2pn_map[ enc_level ];
568 41390838 : }
569 :
570 : /* This code is directly from rfc9000 A.3 */
571 : FD_FN_CONST ulong
572 : fd_quic_reconstruct_pkt_num( ulong pktnum_comp,
573 : ulong pktnum_sz,
574 13796810 : ulong exp_pkt_number ) {
575 13796810 : ulong pn_nbits = pktnum_sz << 3u;
576 13796810 : ulong pn_win = 1ul << pn_nbits;
577 13796810 : ulong pn_hwin = pn_win >> 1ul;
578 13796810 : ulong pn_mask = pn_win - 1ul;
579 : // The incoming packet number should be greater than
580 : // exp_pkt_number - pn_hwin and less than or equal to
581 : // exp_pkt_number + pn_hwin
582 : //
583 : // This means we cannot just strip the trailing bits from
584 : // exp_pkt_number and add the truncated_pn because that might
585 : // yield a value outside the window.
586 : //
587 : // The following code calculates a candidate value and
588 : // makes sure it's within the packet number window.
589 : // Note the extra checks to prevent overflow and underflow.
590 13796810 : ulong candidate_pn = ( exp_pkt_number & ~pn_mask ) | pktnum_comp;
591 13796810 : if( candidate_pn + pn_hwin <= exp_pkt_number &&
592 13796810 : candidate_pn + pn_win < ( 1ul << 62ul ) ) {
593 0 : return candidate_pn + pn_win;
594 0 : }
595 :
596 13796810 : if( candidate_pn > exp_pkt_number + pn_hwin &&
597 13796810 : candidate_pn >= pn_win ) {
598 0 : return candidate_pn - pn_win;
599 0 : }
600 :
601 13796810 : return candidate_pn;
602 13796810 : }
603 :
604 : /* fd_quic_svc_prep_schedule sets conn->svc_meta.next_timeout to
605 : min of current and provided expiry time. */
606 : static inline void
607 : fd_quic_svc_prep_schedule( fd_quic_conn_t * conn,
608 131539795 : long expiry ) {
609 131539795 : conn->svc_meta.next_timeout = fd_long_min( conn->svc_meta.next_timeout, expiry );
610 131539795 : }
611 :
612 : /* fd_quic_svc_prep_schedule_now sets conn->svc_meta.next_timeout to
613 : current time. For when state is not already available */
614 : static inline void
615 13569740 : fd_quic_svc_prep_schedule_now( fd_quic_conn_t * conn ) {
616 13569740 : fd_quic_state_t * state = fd_quic_get_state( conn->quic );
617 13569740 : fd_quic_svc_prep_schedule( conn, state->now );
618 13569740 : }
619 :
620 : /* Scheduling helper. Retrieves timers from conn to call schedule */
621 : static inline void
622 13540847 : fd_quic_svc_schedule1( fd_quic_conn_t * conn ) {
623 13540847 : fd_quic_state_t * state = fd_quic_get_state( conn->quic );
624 13540847 : fd_quic_svc_timers_schedule( state->svc_timers, conn, state->now );
625 13540847 : }
626 :
627 : /* Validation Helper */
628 : static inline void
629 104135025 : svc_cnt_eq_alloc_conn( fd_quic_svc_timers_t * timers, fd_quic_t * quic ) {
630 104135025 : ulong const event_cnt = fd_quic_svc_timers_cnt_events( timers );
631 104135025 : ulong const conn_cnt = quic->metrics.conn_alloc_cnt;
632 104135025 : if( FD_UNLIKELY( event_cnt != conn_cnt ) ) {
633 0 : FD_LOG_CRIT(( "only %lu out of %lu connections are in timer", event_cnt, conn_cnt ));
634 0 : }
635 104135025 : }
636 :
637 : /* validates the free conn list doesn't cycle, point nowhere, leak, or point to live conn */
638 : static void
639 57 : fd_quic_conn_free_validate( fd_quic_t * quic ) {
640 57 : fd_quic_state_t * state = fd_quic_get_state( quic );
641 :
642 : /* initialize visited */
643 57 : fd_quic_conn_validate_init( quic );
644 :
645 57 : ulong cnt = 0UL;
646 57 : uint node = state->free_conn_list;
647 501 : while( node!=UINT_MAX ) {
648 444 : FD_TEST( node <= quic->limits.conn_cnt );
649 444 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, node );
650 444 : FD_TEST( conn->state == FD_QUIC_CONN_STATE_INVALID );
651 444 : conn->visited = 1U;
652 444 : node = conn->free_conn_next;
653 444 : cnt++;
654 444 : FD_TEST( cnt <= quic->limits.conn_cnt );
655 444 : }
656 :
657 300525 : for( ulong j=0UL; j < quic->limits.conn_cnt; j++ ) {
658 300468 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, j );
659 300468 : FD_TEST( conn->conn_idx==j );
660 300468 : if( conn->state == FD_QUIC_CONN_STATE_INVALID ) {
661 444 : FD_TEST( conn->visited );
662 300024 : } else {
663 300024 : FD_TEST( !conn->visited );
664 300024 : }
665 300468 : }
666 57 : }
667 :
668 : void
669 57 : fd_quic_state_validate( fd_quic_t * quic ) {
670 57 : fd_quic_state_t * state = fd_quic_get_state( quic );
671 :
672 : /* init visited for svc_timers_validate to use */
673 57 : fd_quic_conn_validate_init( quic );
674 57 : FD_TEST( fd_quic_svc_timers_validate( state->svc_timers, quic ) );
675 :
676 57 : fd_quic_conn_free_validate( quic );
677 57 : }
678 :
679 : /* Helpers for generating fd_quic_log entries */
680 :
681 : static fd_quic_log_hdr_t
682 0 : fd_quic_log_conn_hdr( fd_quic_conn_t const * conn ) {
683 0 : fd_quic_log_hdr_t hdr = {
684 0 : .conn_id = conn->our_conn_id,
685 0 : .flags = 0
686 0 : };
687 0 : return hdr;
688 0 : }
689 :
690 : static fd_quic_log_hdr_t
691 : fd_quic_log_full_hdr( fd_quic_conn_t const * conn,
692 90 : fd_quic_pkt_t const * pkt ) {
693 90 : fd_quic_log_hdr_t hdr = {
694 90 : .conn_id = conn->our_conn_id,
695 90 : .pkt_num = pkt->pkt_number,
696 90 : .ip4_saddr = pkt->ip4->saddr,
697 90 : .udp_sport = pkt->udp->net_sport,
698 90 : .enc_level = (uchar)pkt->enc_level,
699 90 : .flags = 0
700 90 : };
701 90 : return hdr;
702 90 : }
703 :
704 : inline static void
705 : fd_quic_set_conn_state( fd_quic_conn_t * conn,
706 393618 : uint state ) {
707 393618 : FD_COMPILER_MFENCE();
708 393618 : uint old_state = conn->state;
709 393618 : conn->quic->metrics.conn_state_cnt[ old_state ]--;
710 393618 : conn->quic->metrics.conn_state_cnt[ state ]++;
711 393618 : conn->state = state;
712 393618 : FD_COMPILER_MFENCE();
713 393618 : }
714 :
715 :
716 : /* fd_quic_conn_error sets the connection state to aborted. This does
717 : not destroy the connection object. Rather, it will eventually cause
718 : the connection to be freed during a later fd_quic_service call.
719 : reason is an RFC 9000 QUIC error code. error_line is the source line
720 : of code in fd_quic.c */
721 :
722 : static void
723 : fd_quic_conn_error1( fd_quic_conn_t * conn,
724 90 : uint reason ) {
725 90 : if( FD_UNLIKELY( !conn || conn->state == FD_QUIC_CONN_STATE_DEAD ) ) return;
726 :
727 90 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_ABORT );
728 90 : conn->reason = reason;
729 :
730 : /* set connection to be serviced ASAP */
731 90 : fd_quic_svc_prep_schedule_now( conn );
732 90 : fd_quic_svc_schedule1( conn );
733 90 : }
734 :
735 : static void
736 : fd_quic_conn_error( fd_quic_conn_t * conn,
737 : uint reason,
738 0 : uint error_line ) {
739 0 : fd_quic_conn_error1( conn, reason );
740 :
741 0 : fd_quic_state_t * state = fd_quic_get_state( conn->quic );
742 :
743 0 : ulong sig = fd_quic_log_sig( FD_QUIC_EVENT_CONN_QUIC_CLOSE );
744 0 : fd_quic_log_error_t * frame = fd_quic_log_tx_prepare( state->log_tx );
745 0 : *frame = (fd_quic_log_error_t) {
746 0 : .hdr = fd_quic_log_conn_hdr( conn ),
747 0 : .code = { reason, 0UL },
748 0 : .src_file = "fd_quic.c",
749 0 : .src_line = error_line,
750 0 : };
751 0 : fd_quic_log_tx_submit( state->log_tx, sizeof(fd_quic_log_error_t), sig, (long)state->now );
752 0 : }
753 :
754 : static void
755 : fd_quic_frame_error( fd_quic_frame_ctx_t const * ctx,
756 : uint reason,
757 90 : uint error_line ) {
758 90 : fd_quic_t * quic = ctx->quic;
759 90 : fd_quic_conn_t * conn = ctx->conn;
760 90 : fd_quic_pkt_t const * pkt = ctx->pkt;
761 90 : fd_quic_state_t * state = fd_quic_get_state( quic );
762 :
763 90 : fd_quic_conn_error1( conn, reason );
764 :
765 90 : uint tls_reason = 0U;
766 90 : if( conn->tls_hs ) tls_reason = conn->tls_hs->hs.base.reason;
767 :
768 90 : ulong sig = fd_quic_log_sig( FD_QUIC_EVENT_CONN_QUIC_CLOSE );
769 90 : fd_quic_log_error_t * frame = fd_quic_log_tx_prepare( state->log_tx );
770 90 : *frame = (fd_quic_log_error_t) {
771 90 : .hdr = fd_quic_log_full_hdr( conn, pkt ),
772 90 : .code = { reason, tls_reason },
773 90 : .src_file = "fd_quic.c",
774 90 : .src_line = error_line,
775 90 : };
776 90 : fd_quic_log_tx_submit( state->log_tx, sizeof(fd_quic_log_error_t), sig, state->now );
777 90 : }
778 :
779 : /* returns the encoding level we should use for the next tx quic packet
780 : or all 1's if nothing to tx */
781 : static uint
782 27582253 : fd_quic_tx_enc_level( fd_quic_conn_t * conn, int acks ) {
783 27582253 : uint enc_level = ~0u;
784 :
785 27582253 : uint app_pn_space = fd_quic_enc_level_to_pn_space( fd_quic_enc_level_appdata_id );
786 27582253 : ulong app_pkt_number = conn->pkt_number[app_pn_space];
787 :
788 : /* fd_quic_tx_enc_level( ... )
789 : check status - if closing, set based on handshake complete
790 : check for acks
791 : find lowest enc level
792 : check for hs_data
793 : find lowest enc level
794 : if any, use lowest
795 : else
796 : if stream data, use 1-rtt
797 : else
798 : nothing to do */
799 :
800 : /* check status */
801 27582253 : switch( conn->state ) {
802 0 : case FD_QUIC_CONN_STATE_DEAD:
803 : /* do not send on dead connection at all */
804 0 : return ~0u;
805 :
806 168 : case FD_QUIC_CONN_STATE_ABORT:
807 12204 : case FD_QUIC_CONN_STATE_CLOSE_PENDING:
808 : /* use handshake or app enc level depending on handshake complete */
809 12204 : if( !(conn->flags & FD_QUIC_CONN_FLAGS_CLOSE_SENT ) ) {
810 6102 : if( conn->handshake_complete ) {
811 6018 : return fd_quic_enc_level_appdata_id;
812 6018 : } else if( fd_uint_extract_bit( conn->keys_avail, fd_quic_enc_level_handshake_id ) ) {
813 0 : return fd_quic_enc_level_handshake_id;
814 84 : } else if( fd_uint_extract_bit( conn->keys_avail, fd_quic_enc_level_initial_id ) ) {
815 84 : return fd_quic_enc_level_initial_id;
816 84 : }
817 6102 : }
818 6102 : return ~0u;
819 :
820 : /* TODO consider this optimization... but we want to ack all handshakes, even if there is stream_data */
821 27515617 : case FD_QUIC_CONN_STATE_ACTIVE:
822 27515617 : if( FD_LIKELY( !conn->tls_hs ) ) {
823 : /* optimization for case where we have stream data to send */
824 :
825 : /* find stream data to send */
826 27503497 : fd_quic_stream_t * sentinel = conn->send_streams;
827 27503497 : fd_quic_stream_t * stream = sentinel->next;
828 27503497 : if( !stream->sentinel && stream->upd_pkt_number >= app_pkt_number ) {
829 13545563 : return fd_quic_enc_level_appdata_id;
830 13545563 : }
831 27503497 : }
832 27582253 : }
833 :
834 : /* pick enc_level of oldest ACK not yet sent */
835 14024486 : fd_quic_ack_gen_t * ack_gen = conn->ack_gen;
836 14024486 : fd_quic_ack_t const * oldest_ack = fd_quic_ack_queue_ele( ack_gen, ack_gen->tail );
837 14024486 : uint ack_enc_level = oldest_ack->enc_level; /* speculative load (might be invalid) */
838 14024486 : if( ack_gen->head != ack_gen->tail && acks ) {
839 232653 : return ack_enc_level;
840 232653 : }
841 :
842 : /* Check for handshake data to send */
843 13791833 : uint peer_enc_level = conn->peer_enc_level;
844 13791833 : if( FD_UNLIKELY( conn->tls_hs ) ) {
845 42432 : fd_quic_tls_hs_data_t * hs_data = NULL;
846 :
847 139416 : for( uint i = peer_enc_level; i < 4 && i < enc_level; ++i ) {
848 109110 : if( enc_level == ~0u || enc_level == i ) {
849 109110 : hs_data = fd_quic_tls_get_hs_data( conn->tls_hs, i );
850 109110 : if( hs_data ) {
851 : /* offset within stream */
852 42432 : ulong offset = conn->hs_sent_bytes[i];
853 : /* skip packets we've sent */
854 90918 : while( hs_data && hs_data->offset + hs_data->data_sz <= offset ) {
855 48486 : hs_data = fd_quic_tls_get_next_hs_data( conn->tls_hs, hs_data );
856 48486 : }
857 42432 : if( hs_data ) {
858 12126 : enc_level = i;
859 12126 : return enc_level;
860 12126 : }
861 42432 : }
862 109110 : }
863 109110 : }
864 42432 : }
865 :
866 : /* if we have acks to send or handshake data, then use that enc_level */
867 13779707 : if( enc_level != ~0u ) return enc_level;
868 :
869 : /* handshake done? */
870 13779707 : if( FD_UNLIKELY( conn->handshake_done_send ) ) return fd_quic_enc_level_appdata_id;
871 :
872 : /* find stream data to send */
873 13773647 : fd_quic_stream_t * sentinel = conn->send_streams;
874 13773647 : fd_quic_stream_t * stream = sentinel->next;
875 13773647 : if( !stream->sentinel && stream->upd_pkt_number >= app_pkt_number ) {
876 0 : return fd_quic_enc_level_appdata_id;
877 0 : }
878 :
879 13773647 : if( conn->flags && conn->upd_pkt_number >= app_pkt_number ) {
880 6081 : return fd_quic_enc_level_appdata_id;
881 6081 : }
882 :
883 : /* nothing to send */
884 13767566 : return ~0u;
885 13773647 : }
886 :
887 : /* Include frame code generator */
888 :
889 : #include "templ/fd_quic_frame.c"
890 :
891 : /* handle single v1 frames */
892 : /* returns bytes consumed */
893 : ulong
894 : fd_quic_handle_v1_frame( fd_quic_t * quic,
895 : fd_quic_conn_t * conn,
896 : fd_quic_pkt_t * pkt,
897 : uint pkt_type,
898 : uchar const * buf,
899 76991864 : ulong buf_sz ) {
900 76991864 : if( conn->state == FD_QUIC_CONN_STATE_DEAD ) return FD_QUIC_PARSE_FAIL;
901 76991864 : if( FD_UNLIKELY( buf_sz<1UL ) ) return FD_QUIC_PARSE_FAIL;
902 :
903 : /* Frame ID is technically a varint but it's sufficient to look at the
904 : first byte. */
905 76991864 : uint id = buf[0];
906 :
907 76991864 : FD_DTRACE_PROBE_4( quic_handle_frame, id, conn->our_conn_id, pkt_type, pkt->pkt_number );
908 :
909 76991864 : fd_quic_frame_ctx_t frame_context[1] = {{ quic, conn, pkt }};
910 76991864 : if( FD_UNLIKELY( !fd_quic_frame_type_allowed( pkt_type, id ) ) ) {
911 51 : FD_DTRACE_PROBE_4( quic_err_frame_not_allowed, id, conn->our_conn_id, pkt_type, pkt->pkt_number );
912 51 : fd_quic_frame_error( frame_context, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
913 51 : return FD_QUIC_PARSE_FAIL;
914 51 : }
915 76991813 : quic->metrics.frame_rx_cnt[ fd_quic_frame_metric_id[ id ] ]++;
916 :
917 76991813 : pkt->ack_flag |= fd_uint_if( fd_quic_frame_type_flags[ id ]&FD_QUIC_FRAME_FLAG_N, 0U, ACK_FLAG_RQD );
918 :
919 : /* tail call to frame handler */
920 76991813 : switch( id ) {
921 :
922 0 : # define F(T,MID,NAME,...) \
923 76991813 : case T: return fd_quic_interpret_##NAME##_frame( frame_context, buf, buf_sz );
924 76991813 : FD_QUIC_FRAME_TYPES(F)
925 0 : # undef F
926 :
927 0 : default:
928 : /* FIXME this should be unreachable, but gracefully handle this case as defense-in-depth */
929 : /* unknown frame types are PROTOCOL_VIOLATION errors */
930 0 : FD_DEBUG( FD_LOG_DEBUG(( "unexpected frame type: %u", id )); )
931 0 : fd_quic_frame_error( frame_context, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
932 0 : return FD_QUIC_PARSE_FAIL;
933 76991813 : }
934 :
935 76991813 : }
936 :
937 : fd_quic_t *
938 3324 : fd_quic_fini( fd_quic_t * quic ) {
939 :
940 3324 : if( FD_UNLIKELY( !quic ) ) {
941 0 : FD_LOG_WARNING(("NULL quic"));
942 0 : return NULL;
943 0 : }
944 :
945 : /* Derive memory layout */
946 :
947 3324 : fd_quic_layout_t layout = {0};
948 3324 : fd_quic_footprint_ext( &quic->limits, &layout );
949 :
950 3324 : fd_quic_state_t * state = fd_quic_get_state( quic );
951 :
952 : /* Free conns */
953 :
954 3324 : ulong conn_laddr = (ulong)quic + layout.conns_off;
955 19758 : for( ulong i=0; i < quic->limits.conn_cnt; i++ ) {
956 16434 : fd_quic_conn_t * conn = (fd_quic_conn_t *)( conn_laddr );
957 16434 : conn_laddr += layout.conn_footprint;
958 :
959 16434 : if( conn->state ) fd_quic_conn_free( quic, conn );
960 16434 : }
961 :
962 : /* Deinit TLS */
963 :
964 3324 : fd_quic_tls_hs_pool_delete( fd_quic_tls_hs_pool_leave( state->hs_pool ) ); state->hs_pool = NULL;
965 3324 : fd_quic_tls_delete( state->tls );
966 3324 : fd_quic_tls_hs_cache_delete( fd_quic_tls_hs_cache_leave( &state->hs_cache ) );
967 :
968 :
969 : /* Delete conn ID map */
970 :
971 3324 : fd_quic_conn_map_delete( fd_quic_conn_map_leave( state->conn_map ) );
972 3324 : state->conn_map = NULL;
973 :
974 : /* Clear join-lifetime memory regions */
975 :
976 3324 : memset( state, 0, sizeof(fd_quic_state_t) );
977 :
978 3324 : return quic;
979 3324 : }
980 :
981 : void *
982 2136 : fd_quic_delete( fd_quic_t * quic ) {
983 :
984 2136 : if( FD_UNLIKELY( !quic ) ) {
985 0 : FD_LOG_WARNING(( "NULL quic" ));
986 0 : return NULL;
987 0 : }
988 :
989 2136 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)quic, fd_quic_align() ) ) ) {
990 0 : FD_LOG_WARNING(( "misaligned quic" ));
991 0 : return NULL;
992 0 : }
993 :
994 2136 : if( FD_UNLIKELY( quic->magic!=FD_QUIC_MAGIC ) ) {
995 0 : FD_LOG_WARNING(( "bad magic" ));
996 0 : return NULL;
997 0 : }
998 :
999 2136 : void * shmlog = (void *)( (ulong)quic + quic->layout.log_off );
1000 2136 : if( FD_UNLIKELY( !fd_quic_log_buf_delete( shmlog ) ) ) {
1001 0 : FD_LOG_WARNING(( "fd_quic_log_buf_delete failed" ));
1002 0 : return NULL;
1003 0 : }
1004 :
1005 2136 : FD_COMPILER_MFENCE();
1006 2136 : FD_VOLATILE( quic->magic ) = 0UL;
1007 2136 : FD_COMPILER_MFENCE();
1008 :
1009 2136 : return (void *)quic;
1010 2136 : }
1011 :
1012 : fd_quic_stream_t *
1013 13534658 : fd_quic_conn_new_stream( fd_quic_conn_t * conn ) {
1014 13534658 : if( FD_UNLIKELY( !conn->stream_map ) ) {
1015 : /* QUIC config is receive-only */
1016 0 : return NULL;
1017 0 : }
1018 :
1019 13534658 : fd_quic_t * quic = conn->quic;
1020 13534658 : fd_quic_state_t * state = fd_quic_get_state( quic );
1021 13534658 : if( FD_UNLIKELY( !state->stream_pool ) ) return NULL;
1022 :
1023 13534658 : ulong next_stream_id = conn->tx_next_stream_id;
1024 :
1025 : /* The user is responsible for calling this, for setting limits, */
1026 : /* and for setting stream_pool size */
1027 : /* Only current use cases for QUIC client is for testing */
1028 : /* So leaving this question unanswered for now */
1029 :
1030 : /* peer imposed limit on streams */
1031 13534658 : ulong peer_sup_stream_id = conn->tx_sup_stream_id;
1032 :
1033 : /* is connection inactive */
1034 13534658 : if( FD_UNLIKELY( conn->state != FD_QUIC_CONN_STATE_ACTIVE ||
1035 13534658 : next_stream_id >= peer_sup_stream_id ) ) {
1036 : /* this is a normal condition which occurs whenever we run up to
1037 : the peer advertised limit and represents one form of flow control */
1038 0 : return NULL;
1039 0 : }
1040 :
1041 : /* obtain a stream from stream_pool */
1042 13534658 : fd_quic_stream_t * stream = fd_quic_stream_pool_alloc( state->stream_pool );
1043 :
1044 13534658 : if( FD_UNLIKELY( !stream ) ) {
1045 : /* no streams available in the stream pool */
1046 0 : return NULL;
1047 0 : }
1048 :
1049 : /* add to map of stream ids */
1050 13534658 : fd_quic_stream_map_t * entry = fd_quic_stream_map_insert( conn->stream_map, next_stream_id );
1051 13534658 : if( FD_UNLIKELY( !entry ) ) {
1052 : /* return stream to pool */
1053 0 : fd_quic_stream_pool_free( state->stream_pool, stream );
1054 0 : FD_LOG_INFO(( "stream map insert failed" ));
1055 0 : return NULL;
1056 0 : }
1057 :
1058 13534658 : fd_quic_stream_init( stream );
1059 13534658 : FD_QUIC_STREAM_LIST_INIT_STREAM( stream );
1060 :
1061 : /* stream tx_buf already set */
1062 13534658 : stream->conn = conn;
1063 13534658 : stream->stream_id = next_stream_id;
1064 13534658 : stream->context = NULL;
1065 :
1066 : /* set the max stream data to the appropriate initial value */
1067 13534658 : stream->tx_max_stream_data = conn->tx_initial_max_stream_data_uni;
1068 :
1069 : /* set state depending on stream type */
1070 13534658 : stream->state = FD_QUIC_STREAM_STATE_RX_FIN;
1071 13534658 : stream->stream_flags = 0u;
1072 :
1073 13534658 : memset( stream->tx_ack, 0, stream->tx_buf.cap >> 3ul );
1074 :
1075 : /* insert into used streams */
1076 13534658 : FD_QUIC_STREAM_LIST_REMOVE( stream );
1077 13534658 : FD_QUIC_STREAM_LIST_INSERT_BEFORE( conn->used_streams, stream );
1078 :
1079 : /* generate a new stream id */
1080 13534658 : conn->tx_next_stream_id = next_stream_id + 4U;
1081 :
1082 : /* assign the stream to the entry */
1083 13534658 : entry->stream = stream;
1084 :
1085 : /* update metrics */
1086 13534658 : quic->metrics.stream_opened_cnt++;
1087 13534658 : quic->metrics.stream_active_cnt++;
1088 :
1089 13534658 : FD_DEBUG( FD_LOG_DEBUG(( "Created stream with ID %lu", next_stream_id )) );
1090 13534658 : return stream;
1091 13534658 : }
1092 :
1093 : int
1094 : fd_quic_stream_send( fd_quic_stream_t * stream,
1095 : void const * data,
1096 : ulong data_sz,
1097 13534733 : int fin ) {
1098 13534733 : if( FD_UNLIKELY( stream->state & FD_QUIC_STREAM_STATE_TX_FIN ) ) {
1099 0 : return FD_QUIC_SEND_ERR_FIN;
1100 0 : }
1101 :
1102 13534733 : fd_quic_conn_t * conn = stream->conn;
1103 :
1104 13534733 : fd_quic_buffer_t * tx_buf = &stream->tx_buf;
1105 :
1106 : /* are we allowed to send? */
1107 13534733 : ulong stream_id = stream->stream_id;
1108 :
1109 : /* stream_id & 2 == 0 is bidir
1110 : stream_id & 1 == 0 is client */
1111 13534733 : if( FD_UNLIKELY( ( ( (uint)stream_id & 2u ) == 2u ) &
1112 13534733 : ( ( (uint)stream_id & 1u ) != (uint)conn->server ) ) ) {
1113 0 : return FD_QUIC_SEND_ERR_INVAL_STREAM;
1114 0 : }
1115 :
1116 13534733 : if( FD_UNLIKELY( conn->state != FD_QUIC_CONN_STATE_ACTIVE ) ) {
1117 0 : if( conn->state == FD_QUIC_CONN_STATE_HANDSHAKE ||
1118 0 : conn->state == FD_QUIC_CONN_STATE_HANDSHAKE_COMPLETE ) {
1119 0 : return FD_QUIC_SEND_ERR_STREAM_STATE;
1120 0 : }
1121 0 : return FD_QUIC_SEND_ERR_INVAL_CONN;
1122 0 : }
1123 :
1124 : /* how many bytes are we allowed to send on the stream and on the connection? */
1125 13534733 : ulong allowed_stream = stream->tx_max_stream_data - stream->tx_tot_data;
1126 13534733 : ulong allowed_conn = conn->tx_max_data - conn->tx_tot_data;
1127 13534733 : ulong allowed = fd_ulong_min( allowed_conn, allowed_stream );
1128 :
1129 13534733 : if( data_sz > fd_quic_buffer_avail( tx_buf ) ) {
1130 0 : return FD_QUIC_SEND_ERR_FLOW;
1131 0 : }
1132 :
1133 13534733 : if( data_sz > allowed ) {
1134 0 : return FD_QUIC_SEND_ERR_FLOW;
1135 0 : }
1136 :
1137 : /* store data from data into tx_buf
1138 : this stores, but does not move the head offset */
1139 13534733 : fd_quic_buffer_store( tx_buf, data, data_sz );
1140 :
1141 : /* advance head */
1142 13534733 : tx_buf->head += data_sz;
1143 :
1144 : /* adjust flow control limits on stream and connection */
1145 13534733 : stream->tx_tot_data += data_sz;
1146 13534733 : conn->tx_tot_data += data_sz;
1147 :
1148 : /* insert into send list */
1149 13534733 : if( !FD_QUIC_STREAM_ACTION( stream ) ) {
1150 13534733 : FD_QUIC_STREAM_LIST_REMOVE( stream );
1151 13534733 : FD_QUIC_STREAM_LIST_INSERT_BEFORE( conn->send_streams, stream );
1152 13534733 : }
1153 13534733 : stream->stream_flags |= FD_QUIC_STREAM_FLAGS_UNSENT; /* we have unsent data */
1154 13534733 : stream->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING; /* schedule tx */
1155 :
1156 : /* don't actually set fin flag if we didn't add the last
1157 : byte to the buffer */
1158 13534733 : if( fin ) {
1159 13534634 : fd_quic_stream_fin( stream );
1160 13534634 : }
1161 :
1162 : /* schedule send */
1163 13534733 : fd_quic_svc_prep_schedule_now( conn );
1164 13534733 : fd_quic_svc_schedule1( conn );
1165 :
1166 13534733 : return FD_QUIC_SUCCESS;
1167 13534733 : }
1168 :
1169 : void
1170 13534634 : fd_quic_stream_fin( fd_quic_stream_t * stream ) {
1171 13534634 : if( FD_UNLIKELY( stream->state & FD_QUIC_STREAM_STATE_TX_FIN ) ) {
1172 0 : return;
1173 0 : }
1174 :
1175 13534634 : fd_quic_conn_t * conn = stream->conn;
1176 :
1177 : /* insert into send list */
1178 13534634 : if( !FD_QUIC_STREAM_ACTION( stream ) ) {
1179 0 : FD_QUIC_STREAM_LIST_REMOVE( stream );
1180 0 : FD_QUIC_STREAM_LIST_INSERT_BEFORE( conn->send_streams, stream );
1181 0 : }
1182 13534634 : stream->stream_flags |= FD_QUIC_STREAM_FLAGS_TX_FIN; /* state immediately updated */
1183 13534634 : stream->state |= FD_QUIC_STREAM_STATE_TX_FIN; /* state immediately updated */
1184 13534634 : stream->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING; /* update to be sent in next packet */
1185 :
1186 : /* TODO update metrics */
1187 13534634 : }
1188 :
1189 : void
1190 0 : fd_quic_conn_set_rx_max_data( fd_quic_conn_t * conn, ulong rx_max_data ) {
1191 : /* cannot reduce max_data, and cannot increase beyond max varint */
1192 0 : if( rx_max_data > conn->srx->rx_max_data && rx_max_data < (1UL<<62)-1UL ) {
1193 0 : conn->srx->rx_max_data = rx_max_data;
1194 0 : conn->flags |= FD_QUIC_CONN_FLAGS_MAX_DATA;
1195 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
1196 0 : fd_quic_svc_prep_schedule_now( conn );
1197 0 : fd_quic_svc_schedule1( conn );
1198 0 : }
1199 0 : }
1200 :
1201 : /* packet processing */
1202 :
1203 : /* fd_quic_conn_free_pkt_meta frees all pkt_meta associated with
1204 : encryption levels less or equal to enc_level. Returns the number
1205 : of freed pkt_meta. */
1206 : static ulong
1207 : fd_quic_conn_free_pkt_meta( fd_quic_conn_t * conn,
1208 38571 : uint enc_level ) {
1209 38571 : ulong freed = 0UL;
1210 38571 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
1211 38571 : fd_quic_pkt_meta_t * pool = tracker->pool;
1212 :
1213 144375 : for( uint j=0; j<=enc_level; ++j ) {
1214 105804 : fd_quic_pkt_meta_ds_t * sent = &tracker->sent_pkt_metas[j];
1215 105804 : fd_quic_pkt_meta_t * prev = NULL;
1216 105804 : for( fd_quic_pkt_meta_ds_fwd_iter_t iter = fd_quic_pkt_meta_ds_fwd_iter_init( sent, pool );
1217 136229 : !fd_quic_pkt_meta_ds_fwd_iter_done( iter );
1218 105804 : iter = fd_quic_pkt_meta_ds_fwd_iter_next( iter, pool ) ) {
1219 30425 : fd_quic_pkt_meta_t * e = fd_quic_pkt_meta_ds_fwd_iter_ele( iter, pool );
1220 30425 : if( FD_LIKELY( prev ) ) {
1221 6197 : fd_quic_pkt_meta_pool_ele_release( pool, prev );
1222 6197 : }
1223 30425 : prev = e;
1224 30425 : }
1225 105804 : if( FD_LIKELY( prev ) ) {
1226 24228 : fd_quic_pkt_meta_pool_ele_release( pool, prev );
1227 24228 : }
1228 :
1229 105804 : conn->used_pkt_meta -= fd_quic_pkt_meta_ds_ele_cnt( sent );
1230 105804 : freed += fd_quic_pkt_meta_ds_ele_cnt( sent );
1231 105804 : fd_quic_pkt_meta_ds_clear( tracker, j );
1232 105804 : }
1233 38571 : return freed;
1234 38571 : }
1235 :
1236 :
1237 : /* fd_quic_abandon_enc_level frees all resources associated encryption
1238 : levels less or equal to enc_level. Returns the number of freed
1239 : pkt_meta. */
1240 :
1241 : ulong
1242 : fd_quic_abandon_enc_level( fd_quic_conn_t * conn,
1243 30300 : uint enc_level ) {
1244 30300 : if( FD_LIKELY( !fd_uint_extract_bit( conn->keys_avail, (int)enc_level ) ) ) return 0UL;
1245 24240 : FD_DEBUG( FD_LOG_DEBUG(( "conn=%p abandoning enc_level=%u", (void *)conn, enc_level )); )
1246 :
1247 24240 : fd_quic_ack_gen_abandon_enc_level( conn->ack_gen, enc_level );
1248 :
1249 24240 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
1250 24240 : fd_quic_pkt_meta_t * pool = tracker->pool;
1251 :
1252 72720 : for( uint j = 0; j <= enc_level; ++j ) {
1253 48480 : conn->keys_avail = fd_uint_clear_bit( conn->keys_avail, (int)j );
1254 : /* treat all packets as ACKed (freeing handshake data, etc.) */
1255 48480 : fd_quic_pkt_meta_ds_t * sent = &tracker->sent_pkt_metas[j];
1256 :
1257 48480 : for( fd_quic_pkt_meta_ds_fwd_iter_t iter = fd_quic_pkt_meta_ds_fwd_iter_init( sent, pool );
1258 60606 : !fd_quic_pkt_meta_ds_fwd_iter_done( iter );
1259 48480 : iter = fd_quic_pkt_meta_ds_fwd_iter_next( iter, pool ) ) {
1260 12126 : fd_quic_pkt_meta_t * e = fd_quic_pkt_meta_ds_fwd_iter_ele( iter, pool );
1261 12126 : fd_quic_reclaim_pkt_meta( conn, e, j );
1262 12126 : }
1263 48480 : }
1264 :
1265 24240 : return fd_quic_conn_free_pkt_meta( conn, enc_level );
1266 30300 : }
1267 :
1268 : static void
1269 : fd_quic_gen_initial_secret_and_keys(
1270 : fd_quic_conn_t * conn,
1271 : fd_quic_conn_id_t const * dst_conn_id,
1272 6099 : int is_server ) {
1273 :
1274 6099 : fd_quic_gen_initial_secrets(
1275 6099 : &conn->secrets,
1276 6099 : dst_conn_id->conn_id, dst_conn_id->sz,
1277 6099 : is_server );
1278 :
1279 6099 : fd_quic_gen_keys(
1280 6099 : &conn->keys[ fd_quic_enc_level_initial_id ][ 0 ],
1281 6099 : conn->secrets.secret[ fd_quic_enc_level_initial_id ][ 0 ] );
1282 :
1283 6099 : fd_quic_gen_keys(
1284 6099 : &conn->keys[ fd_quic_enc_level_initial_id ][ 1 ],
1285 6099 : conn->secrets.secret[ fd_quic_enc_level_initial_id ][ 1 ] );
1286 6099 : }
1287 :
1288 : static ulong
1289 : fd_quic_send_retry( fd_quic_t * quic,
1290 : fd_quic_pkt_t * pkt,
1291 : fd_quic_conn_id_t const * odcid,
1292 : fd_quic_conn_id_t const * scid,
1293 135 : ulong new_conn_id ) {
1294 :
1295 135 : fd_quic_state_t * state = fd_quic_get_state( quic );
1296 :
1297 135 : long expire_at = state->now + quic->config.retry_ttl;
1298 135 : uchar retry_pkt[ FD_QUIC_RETRY_LOCAL_SZ ];
1299 135 : 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 );
1300 :
1301 135 : quic->metrics.retry_tx_cnt++;
1302 :
1303 135 : uchar * tx_ptr = retry_pkt + retry_pkt_sz;
1304 135 : if( FD_UNLIKELY( fd_quic_tx_buffered_raw(
1305 135 : quic,
1306 : // these are state variable's normally updated on a conn, but irrelevant in retry so we
1307 : // just size it exactly as the encoded retry packet
1308 135 : &tx_ptr,
1309 135 : retry_pkt,
1310 : // encode buffer
1311 135 : &pkt->ip4->net_id,
1312 135 : pkt->ip4->saddr,
1313 135 : pkt->udp->net_sport,
1314 135 : pkt->ip4->daddr,
1315 135 : pkt->udp->net_dport ) == FD_QUIC_FAILED ) ) {
1316 0 : return FD_QUIC_PARSE_FAIL;
1317 0 : }
1318 135 : return 0UL;
1319 135 : }
1320 :
1321 : /* fd_quic_tls_hs_cache_evict evicts the oldest tls_hs if it's exceeded its ttl
1322 : Assumes cache is non-empty
1323 : and returns 1 if evicted, otherwise returns 0. */
1324 : static int
1325 : fd_quic_tls_hs_cache_evict( fd_quic_t * quic,
1326 6 : fd_quic_state_t * state ) {
1327 :
1328 6 : fd_quic_tls_hs_t* hs_to_free = fd_quic_tls_hs_cache_ele_peek_head( &state->hs_cache, state->hs_pool );
1329 :
1330 6 : if( state->now < hs_to_free->birthtime + quic->config.tls_hs_ttl ) {
1331 : /* oldest is too young to evict */
1332 3 : quic->metrics.hs_err_alloc_fail_cnt++;
1333 3 : return 0;
1334 3 : }
1335 :
1336 3 : fd_quic_conn_free( quic, hs_to_free->context );
1337 3 : quic->metrics.hs_evicted_cnt++;
1338 3 : return 1;
1339 6 : }
1340 :
1341 : /* fd_quic_handle_v1_initial handles an "Initial"-type packet.
1342 : Valid for both server and client. Initial packets are used to
1343 : establish QUIC conns and wrap the TLS handshake flow among other
1344 : things. */
1345 :
1346 : ulong
1347 : fd_quic_handle_v1_initial( fd_quic_t * quic,
1348 : fd_quic_conn_t ** p_conn,
1349 : fd_quic_pkt_t * pkt,
1350 : fd_quic_conn_id_t const * dcid,
1351 : fd_quic_conn_id_t const * peer_scid,
1352 : uchar * cur_ptr,
1353 15606 : ulong cur_sz ) {
1354 15606 : fd_quic_conn_t * conn = *p_conn;
1355 15606 : if( FD_UNLIKELY( conn &&
1356 15606 : ( conn->state==FD_QUIC_CONN_STATE_INVALID ||
1357 15606 : !fd_uint_extract_bit( conn->keys_avail, fd_quic_enc_level_initial_id ) ) ) ) {
1358 3 : quic->metrics.pkt_no_key_cnt[ fd_quic_enc_level_initial_id ]++;
1359 3 : return FD_QUIC_PARSE_FAIL;
1360 3 : }
1361 :
1362 15603 : fd_quic_state_t * state = fd_quic_get_state( quic );
1363 15603 : fd_quic_metrics_t * metrics = &quic->metrics;
1364 :
1365 : /* Initial packets are de-facto unencrypted. Packet protection is
1366 : still applied, albeit with publicly known encryption keys.
1367 :
1368 : RFC 9001 specifies use of the TLS_AES_128_GCM_SHA256_ID suite for
1369 : initial secrets and keys. */
1370 :
1371 : /* Parse initial packet */
1372 :
1373 15603 : fd_quic_initial_t initial[1] = {0};
1374 15603 : ulong rc = fd_quic_decode_initial( initial, cur_ptr, cur_sz );
1375 15603 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
1376 1494 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_decode_initial failed" )) );
1377 1494 : return FD_QUIC_PARSE_FAIL;
1378 1494 : }
1379 :
1380 : /* Check bounds on initial */
1381 :
1382 : /* len indicated the number of bytes after the packet number offset
1383 : so verify this value is within the packet */
1384 14109 : ulong pn_offset = initial->pkt_num_pnoff;
1385 14109 : ulong body_sz = initial->len; /* length of packet number, frames, and auth tag */
1386 14109 : ulong tot_sz = pn_offset + body_sz;
1387 14109 : if( FD_UNLIKELY( tot_sz > cur_sz ) ) {
1388 66 : FD_DEBUG( FD_LOG_DEBUG(( "Bogus initial packet length" )) );
1389 66 : return FD_QUIC_PARSE_FAIL;
1390 66 : }
1391 :
1392 : /* count received token len */
1393 14043 : int const token_len_match = initial->token_len == sizeof(fd_quic_retry_token_t);
1394 14043 : ulong const token_len_idx = fd_ulong_if( !!initial->token_len,
1395 14043 : fd_ulong_if( token_len_match, 1, 2 ),
1396 14043 : 0 );
1397 14043 : metrics->initial_token_len_cnt[ token_len_idx ]++;
1398 :
1399 : /* Check it is valid for a token to be present in an initial packet in the current context.
1400 :
1401 : quic->config.role == FD_QUIC_ROLE_CLIENT
1402 : - Indicates the client received an initial packet with a token from a server. "Initial packets
1403 : sent by the server MUST set the Token Length field to 0; clients that receive an Initial packet
1404 : with a non-zero Token Length field MUST either discard the packet or generate a connection
1405 : error of type PROTOCOL_VIOLATION (RFC 9000, Section 17.2.2)"
1406 :
1407 : quic->config.retry == false
1408 : - Indicates the server is not configured to retry, but a client attached a token to this
1409 : initial packet. NEW_TOKEN frames are not supported, so this implementation treats the presence
1410 : of a token when retry is disabled as an error. */
1411 14043 : if( FD_UNLIKELY( initial->token_len > 0 &&
1412 14043 : ( quic->config.role == FD_QUIC_ROLE_CLIENT || !quic->config.retry ) ) ) {
1413 21 : FD_DEBUG( FD_LOG_DEBUG(( "Rejecting initial with token" )); )
1414 21 : return FD_QUIC_PARSE_FAIL;
1415 21 : }
1416 :
1417 :
1418 14022 : ulong scid; /* outgoing scid */
1419 14022 : fd_quic_conn_id_t odcid; /* dst conn id from client's original Initial */
1420 :
1421 : /* Do we have a conn object for this dest conn ID?
1422 : If not, sanity check, send/verify retry if needed */
1423 14022 : if( FD_UNLIKELY( !conn ) ) {
1424 : /* if we're a client, and no conn, discard */
1425 7962 : if( quic->config.role == FD_QUIC_ROLE_CLIENT ) {
1426 : /* connection may have been torn down */
1427 774 : FD_DEBUG( FD_LOG_DEBUG(( "unknown connection ID" )); )
1428 774 : metrics->pkt_no_conn_cnt[ fd_quic_enc_level_initial_id ]++;
1429 774 : FD_DTRACE_PROBE_2( fd_quic_handle_v1_initial_no_conn , state->now, pkt->pkt_number );
1430 774 : return FD_QUIC_PARSE_FAIL;
1431 774 : }
1432 :
1433 : /* According to RFC 9000 Section 14.1, INITIAL packets less than a
1434 : certain length must be discarded, and the connection may be closed.
1435 : (Mitigates UDP amplification) */
1436 7188 : if( pkt->datagram_sz < FD_QUIC_INITIAL_PAYLOAD_SZ_MIN ) {
1437 : /* can't trust the included values, so can't reply */
1438 735 : return FD_QUIC_PARSE_FAIL;
1439 735 : }
1440 :
1441 : /* Early check: Is conn free? */
1442 6453 : if( FD_UNLIKELY( state->free_conn_list==UINT_MAX ) ) {
1443 0 : FD_DEBUG( FD_LOG_DEBUG(( "ignoring conn request: no free conn slots" )) );
1444 0 : metrics->conn_err_no_slots_cnt++;
1445 0 : return FD_QUIC_PARSE_FAIL; /* FIXME better error code? */
1446 0 : }
1447 :
1448 :
1449 : /* Primary objective is to send or verify retry.
1450 : We'll also select the scid we'll use from now on.
1451 :
1452 : Rules for selecting the SCID:
1453 : - No retry token, accepted: generate new random ID
1454 : - No retry token, retry request: generate new random ID
1455 : - Retry token, accepted: reuse SCID from retry token */
1456 6453 : if( !quic->config.retry ) {
1457 6312 : scid = fd_rng_ulong( state->_rng );
1458 6312 : } else { /* retry configured */
1459 :
1460 : /* Need to send retry? Do so before more work */
1461 141 : if( initial->token_len != sizeof(fd_quic_retry_token_t) ) {
1462 :
1463 135 : ulong new_conn_id_u64 = fd_rng_ulong( state->_rng );
1464 135 : if( FD_UNLIKELY( fd_quic_send_retry(
1465 135 : quic, pkt,
1466 135 : dcid, peer_scid, new_conn_id_u64 ) ) ) {
1467 0 : return FD_QUIC_FAILED;
1468 0 : }
1469 135 : return (initial->pkt_num_pnoff + initial->len);
1470 135 : } else {
1471 : /* This Initial packet is in response to our Retry.
1472 : Validate the relevant fields of this post-retry INITIAL packet,
1473 : i.e. retry src conn id, ip, port
1474 : Also populate odcid and scid from the retry data */
1475 6 : int retry_ok = fd_quic_retry_server_verify( pkt, initial, &odcid, &scid, state->retry_secret, state->retry_iv, state->now, quic->config.retry_ttl );
1476 6 : if( FD_UNLIKELY( retry_ok!=FD_QUIC_SUCCESS ) ) {
1477 0 : metrics->conn_err_retry_fail_cnt++;
1478 : /* No need to set conn error, no conn object exists */
1479 0 : return FD_QUIC_PARSE_FAIL;
1480 6 : };
1481 6 : }
1482 141 : }
1483 6453 : }
1484 :
1485 : /* Determine decryption keys, related data */
1486 :
1487 : /* Placeholder for generated crypto material before allocating conn */
1488 12378 : fd_quic_crypto_keys_t _rx_keys[1];
1489 12378 : fd_quic_crypto_secrets_t _secrets[1];
1490 :
1491 : /* Conditional inputs to decryption stage */
1492 12378 : fd_quic_crypto_keys_t * rx_keys = NULL;
1493 12378 : fd_quic_crypto_secrets_t * secrets = NULL;
1494 12378 : ulong exp_pkt_num;
1495 :
1496 12378 : if( !conn ) {
1497 : /* no conn, generate secret and rx keys */
1498 6318 : rx_keys = _rx_keys;
1499 6318 : secrets = _secrets;
1500 6318 : exp_pkt_num = 0;
1501 :
1502 6318 : fd_quic_gen_initial_secrets(
1503 6318 : secrets,
1504 6318 : dcid->conn_id, dcid->sz,
1505 6318 : /* is_server */ 1 );
1506 6318 : fd_quic_gen_keys(
1507 6318 : rx_keys,
1508 6318 : secrets->secret[ fd_quic_enc_level_initial_id ][ 0 ] );
1509 6318 : } else {
1510 : /* conn, use existing keys/secrets */
1511 6060 : rx_keys = &conn->keys[ fd_quic_enc_level_initial_id ][0];
1512 6060 : secrets = &conn->secrets;
1513 6060 : exp_pkt_num = conn->exp_pkt_number[0];
1514 6060 : }
1515 :
1516 : /* Decrypt incoming packet */
1517 :
1518 : /* header protection needs the offset to the packet number */
1519 :
1520 12378 : # if !FD_QUIC_DISABLE_CRYPTO
1521 : /* this decrypts the header */
1522 12378 : if( FD_UNLIKELY(
1523 12378 : fd_quic_crypto_decrypt_hdr( cur_ptr, cur_sz,
1524 12378 : pn_offset,
1525 12378 : rx_keys ) != FD_QUIC_SUCCESS ) ) {
1526 : /* As this is an INITIAL packet, change the status to DEAD, and allow
1527 : it to be reaped */
1528 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_crypto_decrypt_hdr failed" )) );
1529 0 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_initial_id ]++;
1530 0 : return FD_QUIC_PARSE_FAIL;
1531 0 : }
1532 12378 : # endif /* !FD_QUIC_DISABLE_CRYPTO */
1533 :
1534 12378 : ulong pkt_number_sz = fd_quic_h0_pkt_num_len( cur_ptr[0] ) + 1u;
1535 12378 : ulong pktnum_comp = fd_quic_pktnum_decode( cur_ptr+pn_offset, pkt_number_sz );
1536 :
1537 : /* reconstruct packet number */
1538 12378 : ulong pkt_number = fd_quic_reconstruct_pkt_num( pktnum_comp, pkt_number_sz, exp_pkt_num );
1539 :
1540 12378 : # if !FD_QUIC_DISABLE_CRYPTO
1541 : /* NOTE from rfc9002 s3
1542 : It is permitted for some packet numbers to never be used, leaving intentional gaps. */
1543 : /* this decrypts the header and payload */
1544 12378 : if( FD_UNLIKELY(
1545 12378 : fd_quic_crypto_decrypt( cur_ptr, tot_sz,
1546 12378 : pn_offset,
1547 12378 : pkt_number,
1548 12378 : rx_keys ) != FD_QUIC_SUCCESS ) ) {
1549 177 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_crypto_decrypt failed" )) );
1550 177 : FD_DTRACE_PROBE_2( quic_err_decrypt_initial_pkt, pkt->ip4, pkt->pkt_number );
1551 177 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_initial_id ]++;
1552 177 : return FD_QUIC_PARSE_FAIL;
1553 177 : }
1554 12201 : # endif /* FD_QUIC_DISABLE_CRYPTO */
1555 :
1556 : /* set packet number on the context */
1557 12201 : pkt->pkt_number = pkt_number;
1558 :
1559 12201 : if( FD_UNLIKELY( body_sz < pkt_number_sz + FD_QUIC_CRYPTO_TAG_SZ ) ) {
1560 0 : return FD_QUIC_PARSE_FAIL;
1561 0 : }
1562 :
1563 : /* If no conn, create one. Due to previous checks, role must be server
1564 : and this must be response to Retry (if needed). */
1565 12201 : if( FD_UNLIKELY( !conn ) ) {
1566 :
1567 : /* Save peer's conn ID, which we will use to address peer with. */
1568 6141 : fd_quic_conn_id_t peer_conn_id = {0};
1569 6141 : fd_memcpy( peer_conn_id.conn_id, initial->src_conn_id, FD_QUIC_MAX_CONN_ID_SZ );
1570 6141 : peer_conn_id.sz = initial->src_conn_id_len;
1571 :
1572 : /* Prepare QUIC-TLS transport params object (sent as a TLS extension).
1573 : Take template from state and mutate certain params in-place.
1574 :
1575 : See RFC 9000 Section 18 */
1576 :
1577 : /* TODO Each transport param is a TLV tuple. This allows serializing
1578 : most transport params ahead of time. Only the conn-specific
1579 : differences will have to be appended here. */
1580 :
1581 6141 : fd_quic_transport_params_t tp[1] = { state->transport_params };
1582 :
1583 6141 : if( !quic->config.retry ) {
1584 : /* assume no retry */
1585 6135 : tp->retry_source_connection_id_present = 0;
1586 :
1587 : /* Send orig conn ID back to client (server only) */
1588 :
1589 6135 : tp->original_destination_connection_id_present = 1;
1590 6135 : tp->original_destination_connection_id_len = dcid->sz;
1591 6135 : fd_memcpy( tp->original_destination_connection_id,
1592 6135 : dcid->conn_id,
1593 6135 : dcid->sz );
1594 6135 : } else { /* retry configured */
1595 :
1596 : /* From rfc 9000:
1597 :
1598 : Figure 8 shows a similar handshake that includes a Retry packet.
1599 :
1600 : Client Server
1601 : Initial: DCID=S1, SCID=C1 ->
1602 : <- Retry: DCID=C1, SCID=S2
1603 : Initial: DCID=S2, SCID=C1 ->
1604 : <- Initial: DCID=C1, SCID=S3
1605 : ...
1606 : 1-RTT: DCID=S3 ->
1607 : <- 1-RTT: DCID=C1
1608 :
1609 : Figure 8: Use of Connection IDs in a Handshake with Retry
1610 : In both cases (Figures 7 and 8), the client sets the value of the
1611 : initial_source_connection_id transport parameter to C1.
1612 :
1613 : When the handshake does not include a Retry (Figure 7), the server
1614 : sets original_destination_connection_id to S1 (note that this value
1615 : is chosen by the client) and initial_source_connection_id to S3. In
1616 : this case, the server does not include a retry_source_connection_id
1617 : transport parameter.
1618 :
1619 : When the handshake includes a Retry (Figure 8), the server sets
1620 : original_destination_connection_id to S1, retry_source_connection_id
1621 : to S2, and initial_source_connection_id to S3. */
1622 6 : tp->original_destination_connection_id_present = 1;
1623 6 : tp->original_destination_connection_id_len = odcid.sz;
1624 6 : memcpy( tp->original_destination_connection_id,
1625 6 : odcid.conn_id,
1626 6 : odcid.sz );
1627 :
1628 : /* Client echoes back the SCID we sent via Retry. Safe to trust
1629 : because we signed the Retry Token. (Length and content validated
1630 : in fd_quic_retry_server_verify) */
1631 6 : tp->retry_source_connection_id_present = 1;
1632 6 : tp->retry_source_connection_id_len = FD_QUIC_CONN_ID_SZ;
1633 6 : FD_STORE( ulong, tp->retry_source_connection_id, scid );
1634 :
1635 6 : metrics->conn_retry_cnt++;
1636 6 : }
1637 :
1638 : /* Repeat the conn ID we picked in transport params (this is done
1639 : to authenticate conn IDs via TLS by including them in TLS-
1640 : protected data).
1641 :
1642 : Per spec, this field should be the source conn ID field we've set
1643 : on the first Initial packet we've sent. At this point, we might
1644 : not have sent an Initial packet yet -- so this field should hold
1645 : a value we are about to pick.
1646 :
1647 : fd_quic_conn_create will set conn->initial_source_conn_id to
1648 : the random new_conn_id we've created earlier. */
1649 :
1650 6141 : tp->initial_source_connection_id_present = 1;
1651 6141 : tp->initial_source_connection_id_len = FD_QUIC_CONN_ID_SZ;
1652 6141 : FD_STORE( ulong, tp->initial_source_connection_id, scid );
1653 :
1654 : /* tls hs available? After decrypting because might evict another hs */
1655 6141 : if( FD_UNLIKELY( !fd_quic_tls_hs_pool_free( state->hs_pool ) ) ) {
1656 : /* try evicting, 0 if oldest is too young so fail */
1657 0 : if( !fd_quic_tls_hs_cache_evict( quic, state )) {
1658 0 : return FD_QUIC_PARSE_FAIL;
1659 0 : }
1660 0 : }
1661 :
1662 : /* Allocate new conn */
1663 6141 : conn = fd_quic_conn_create( quic,
1664 6141 : scid,
1665 6141 : &peer_conn_id,
1666 6141 : pkt->ip4->saddr,
1667 6141 : pkt->udp->net_sport,
1668 6141 : pkt->ip4->daddr,
1669 6141 : pkt->udp->net_dport,
1670 6141 : 1 /* server */ );
1671 :
1672 6141 : if( FD_UNLIKELY( !conn ) ) { /* no free connections */
1673 : /* TODO send failure back to origin? */
1674 : /* FIXME unreachable? conn_cnt already checked above */
1675 0 : FD_DEBUG( FD_LOG_WARNING( ( "failed to allocate QUIC conn" ) ) );
1676 0 : return FD_QUIC_PARSE_FAIL;
1677 0 : }
1678 6141 : FD_DEBUG( FD_LOG_DEBUG(( "new connection allocated" )) );
1679 :
1680 : /* set the value for the caller */
1681 6141 : *p_conn = conn;
1682 :
1683 : /* Create a TLS handshake */
1684 6141 : fd_quic_tls_hs_t * tls_hs = fd_quic_tls_hs_new(
1685 6141 : fd_quic_tls_hs_pool_ele_acquire( state->hs_pool ),
1686 6141 : state->tls,
1687 6141 : (void*)conn,
1688 6141 : 1 /*is_server*/,
1689 6141 : tp,
1690 6141 : state->now );
1691 6141 : fd_quic_tls_hs_cache_ele_push_tail( &state->hs_cache, tls_hs, state->hs_pool );
1692 :
1693 6141 : conn->tls_hs = tls_hs;
1694 6141 : quic->metrics.hs_created_cnt++;
1695 :
1696 : /* copy secrets and rx keys */
1697 6141 : conn->secrets = *secrets;
1698 6141 : conn->keys[ fd_quic_enc_level_initial_id ][0] = *rx_keys;
1699 :
1700 : /* generate tx keys */
1701 6141 : fd_quic_gen_keys(
1702 6141 : &conn->keys[ fd_quic_enc_level_initial_id ][ 1 ],
1703 6141 : secrets->secret[ fd_quic_enc_level_initial_id ][ 1 ] );
1704 6141 : }
1705 :
1706 12201 : if( FD_UNLIKELY( !conn->host.ip_addr ) ) {
1707 : /* Lock src IP address in place (previously chosen by layer-4 based
1708 : on the route table) */
1709 12201 : conn->host.ip_addr = pkt->ip4->daddr;
1710 12201 : }
1711 :
1712 : /* check if reply conn id needs to change */
1713 12201 : if( FD_UNLIKELY( !( conn->server | conn->established ) ) ) {
1714 : /* switch to the source connection id for future replies */
1715 :
1716 : /* replace peer 0 connection id */
1717 6060 : conn->peer_cids[0].sz = initial->src_conn_id_len;
1718 6060 : fd_memcpy( conn->peer_cids[0].conn_id, initial->src_conn_id, FD_QUIC_MAX_CONN_ID_SZ );
1719 :
1720 : /* don't repeat this procedure */
1721 6060 : conn->established = 1;
1722 6060 : }
1723 :
1724 : /* handle frames */
1725 12201 : ulong payload_off = pn_offset + pkt_number_sz;
1726 12201 : uchar const * frame_ptr = cur_ptr + payload_off;
1727 12201 : ulong frame_sz = body_sz - pkt_number_sz - FD_QUIC_CRYPTO_TAG_SZ; /* total size of all frames in packet */
1728 36453 : while( frame_sz != 0UL ) {
1729 24333 : rc = fd_quic_handle_v1_frame( quic,
1730 24333 : conn,
1731 24333 : pkt,
1732 24333 : FD_QUIC_PKT_TYPE_INITIAL,
1733 24333 : frame_ptr,
1734 24333 : frame_sz );
1735 24333 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
1736 81 : FD_DEBUG( FD_LOG_DEBUG(( "Failed to handle frame (Initial, frame=0x%02x)", frame_ptr[0] )) );
1737 81 : quic->metrics.frame_rx_err_cnt++;
1738 81 : return FD_QUIC_PARSE_FAIL;
1739 81 : }
1740 :
1741 24252 : if( FD_UNLIKELY( rc==0UL || rc>frame_sz ) ) {
1742 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
1743 0 : return FD_QUIC_PARSE_FAIL;
1744 0 : }
1745 :
1746 : /* next frame, and remaining size */
1747 24252 : frame_ptr += rc;
1748 24252 : frame_sz -= rc;
1749 24252 : }
1750 :
1751 : /* update last activity */
1752 12120 : conn->last_activity = state->now;
1753 12120 : conn->flags &= ~( FD_QUIC_CONN_FLAGS_PING_SENT | FD_QUIC_CONN_FLAGS_PING );
1754 :
1755 : /* update expected packet number */
1756 12120 : conn->exp_pkt_number[0] = fd_ulong_max( conn->exp_pkt_number[0], pkt_number+1UL );
1757 :
1758 : /* insert into service queue */
1759 12120 : fd_quic_svc_prep_schedule( conn, state->now );
1760 :
1761 : /* return number of bytes consumed */
1762 12120 : return tot_sz;
1763 12201 : }
1764 :
1765 : ulong
1766 : fd_quic_handle_v1_handshake(
1767 : fd_quic_t * quic,
1768 : fd_quic_conn_t * conn,
1769 : fd_quic_pkt_t * pkt,
1770 : uchar * cur_ptr,
1771 : ulong cur_sz
1772 12225 : ) {
1773 12225 : fd_quic_state_t * state = fd_quic_get_state( quic );
1774 12225 : if( FD_UNLIKELY( !conn ) ) {
1775 102 : quic->metrics.pkt_no_conn_cnt[ fd_quic_enc_level_handshake_id ]++;
1776 102 : FD_DTRACE_PROBE_2( fd_quic_handle_v1_handshake_no_conn , state->now, pkt->pkt_number );
1777 102 : return FD_QUIC_PARSE_FAIL;
1778 102 : }
1779 :
1780 12123 : if( FD_UNLIKELY( conn->state==FD_QUIC_CONN_STATE_INVALID ||
1781 12123 : !fd_uint_extract_bit( conn->keys_avail, fd_quic_enc_level_handshake_id ) ) ) {
1782 3 : quic->metrics.pkt_no_key_cnt[ fd_quic_enc_level_handshake_id ]++;
1783 3 : return FD_QUIC_PARSE_FAIL;
1784 3 : }
1785 :
1786 : /* do parse here */
1787 12120 : fd_quic_handshake_t handshake[1];
1788 12120 : ulong rc = fd_quic_decode_handshake( handshake, cur_ptr, cur_sz );
1789 12120 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
1790 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_decode_handshake failed" )) );
1791 0 : return FD_QUIC_PARSE_FAIL;
1792 0 : }
1793 :
1794 : /* check bounds on handshake */
1795 :
1796 : /* len indicated the number of bytes after the packet number offset
1797 : so verify this value is within the packet */
1798 12120 : ulong len = (ulong)( handshake->pkt_num_pnoff + handshake->len );
1799 12120 : if( FD_UNLIKELY( len > cur_sz ) ) {
1800 0 : FD_DEBUG( FD_LOG_DEBUG(( "Handshake packet bounds check failed" )); )
1801 0 : return FD_QUIC_PARSE_FAIL;
1802 0 : }
1803 :
1804 : /* connection ids should already be in the relevant structures */
1805 :
1806 : /* TODO prepare most of the transport parameters, and only append the
1807 : necessary differences */
1808 :
1809 : /* fetch TLS handshake */
1810 12120 : fd_quic_tls_hs_t * tls_hs = conn->tls_hs;
1811 12120 : if( FD_UNLIKELY( !tls_hs ) ) {
1812 0 : FD_DEBUG( FD_LOG_DEBUG(( "no tls handshake" )) );
1813 0 : return FD_QUIC_PARSE_FAIL;
1814 0 : }
1815 :
1816 : /* decryption */
1817 :
1818 : /* header protection needs the offset to the packet number */
1819 12120 : ulong pn_offset = handshake->pkt_num_pnoff;
1820 :
1821 12120 : ulong body_sz = handshake->len; /* not a protected field */
1822 : /* length of payload + num packet bytes */
1823 :
1824 12120 : # if !FD_QUIC_DISABLE_CRYPTO
1825 : /* this decrypts the header */
1826 12120 : if( FD_UNLIKELY(
1827 12120 : fd_quic_crypto_decrypt_hdr( cur_ptr, cur_sz,
1828 12120 : pn_offset,
1829 12120 : &conn->keys[2][0] ) != FD_QUIC_SUCCESS ) ) {
1830 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_crypto_decrypt_hdr failed" )) );
1831 0 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_handshake_id ]++;
1832 0 : return FD_QUIC_PARSE_FAIL;
1833 0 : }
1834 12120 : # endif /* !FD_QUIC_DISABLE_CRYPTO */
1835 :
1836 : /* number of bytes in the packet header */
1837 12120 : ulong pkt_number_sz = fd_quic_h0_pkt_num_len( cur_ptr[0] ) + 1u;
1838 12120 : ulong tot_sz = pn_offset + body_sz; /* total including header and payload */
1839 :
1840 : /* now we have decrypted packet number */
1841 12120 : ulong pktnum_comp = fd_quic_pktnum_decode( cur_ptr+pn_offset, pkt_number_sz );
1842 :
1843 : /* reconstruct packet number */
1844 12120 : ulong pkt_number = fd_quic_reconstruct_pkt_num( pktnum_comp, pkt_number_sz, conn->exp_pkt_number[1] );
1845 :
1846 : /* NOTE from rfc9002 s3
1847 : It is permitted for some packet numbers to never be used, leaving intentional gaps. */
1848 :
1849 12120 : # if !FD_QUIC_DISABLE_CRYPTO
1850 : /* this decrypts the header and payload */
1851 12120 : if( FD_UNLIKELY(
1852 12120 : fd_quic_crypto_decrypt( cur_ptr, tot_sz,
1853 12120 : pn_offset,
1854 12120 : pkt_number,
1855 12120 : &conn->keys[2][0] ) != FD_QUIC_SUCCESS ) ) {
1856 : /* remove connection from map, and insert into free list */
1857 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_crypto_decrypt failed" )) );
1858 0 : FD_DTRACE_PROBE_3( quic_err_decrypt_handshake_pkt, pkt->ip4, conn->our_conn_id, pkt->pkt_number );
1859 0 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_handshake_id ]++;
1860 0 : return FD_QUIC_PARSE_FAIL;
1861 0 : }
1862 12120 : # endif /* FD_QUIC_DISABLE_CRYPTO */
1863 :
1864 : /* set packet number on the context */
1865 12120 : pkt->pkt_number = pkt_number;
1866 :
1867 : /* check body size large enough for required elements */
1868 12120 : if( FD_UNLIKELY( body_sz < pkt_number_sz + FD_QUIC_CRYPTO_TAG_SZ ) ) {
1869 0 : return FD_QUIC_PARSE_FAIL;
1870 0 : }
1871 :
1872 : /* RFC 9000 Section 17.2.2.1. Abandoning Initial Packets
1873 : > A server stops sending and processing Initial packets when it
1874 : > receives its first Handshake packet. */
1875 12120 : fd_quic_abandon_enc_level( conn, fd_quic_enc_level_initial_id );
1876 12120 : conn->peer_enc_level = (uchar)fd_uchar_max( conn->peer_enc_level, fd_quic_enc_level_handshake_id );
1877 :
1878 : /* handle frames */
1879 12120 : ulong payload_off = pn_offset + pkt_number_sz;
1880 12120 : uchar const * frame_ptr = cur_ptr + payload_off;
1881 12120 : ulong frame_sz = body_sz - pkt_number_sz - FD_QUIC_CRYPTO_TAG_SZ; /* total size of all frames in packet */
1882 48480 : while( frame_sz != 0UL ) {
1883 36360 : rc = fd_quic_handle_v1_frame( quic,
1884 36360 : conn,
1885 36360 : pkt,
1886 36360 : FD_QUIC_PKT_TYPE_HANDSHAKE,
1887 36360 : frame_ptr,
1888 36360 : frame_sz );
1889 36360 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
1890 0 : FD_DEBUG( FD_LOG_DEBUG(( "Failed to handle frame (Handshake, frame=0x%02x)", frame_ptr[0] )) );
1891 0 : quic->metrics.frame_rx_err_cnt++;
1892 0 : return FD_QUIC_PARSE_FAIL;
1893 0 : }
1894 :
1895 36360 : if( FD_UNLIKELY( rc == 0UL || rc > frame_sz ) ) {
1896 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
1897 0 : return FD_QUIC_PARSE_FAIL;
1898 0 : }
1899 :
1900 : /* next frame and remaining size */
1901 36360 : frame_ptr += rc;
1902 36360 : frame_sz -= rc;
1903 36360 : }
1904 :
1905 : /* update last activity */
1906 12120 : conn->last_activity = fd_quic_get_state( quic )->now;
1907 12120 : conn->flags &= ~( FD_QUIC_CONN_FLAGS_PING_SENT | FD_QUIC_CONN_FLAGS_PING );
1908 :
1909 : /* update expected packet number */
1910 12120 : conn->exp_pkt_number[1] = fd_ulong_max( conn->exp_pkt_number[1], pkt_number+1UL );
1911 :
1912 : /* return number of bytes consumed */
1913 12120 : return tot_sz;
1914 12120 : }
1915 :
1916 : ulong
1917 : fd_quic_handle_v1_retry(
1918 : fd_quic_t * quic,
1919 : fd_quic_conn_t * conn,
1920 : fd_quic_pkt_t const * pkt,
1921 : uchar const * cur_ptr,
1922 : ulong cur_sz
1923 150 : ) {
1924 150 : (void)pkt;
1925 150 : fd_quic_state_t * state = fd_quic_get_state( quic );
1926 :
1927 150 : if( FD_UNLIKELY( quic->config.role == FD_QUIC_ROLE_SERVER ) ) {
1928 36 : if( FD_UNLIKELY( conn ) ) { /* likely a misbehaving client w/o a conn */
1929 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
1930 0 : }
1931 36 : return FD_QUIC_PARSE_FAIL;
1932 36 : }
1933 :
1934 114 : if( FD_UNLIKELY( !conn ) ) {
1935 108 : FD_DTRACE_PROBE_2( fd_quic_handle_v1_retry_no_conn , state->now, pkt->pkt_number );
1936 108 : quic->metrics.pkt_no_conn_cnt[1]++;
1937 108 : return FD_QUIC_PARSE_FAIL;
1938 108 : }
1939 :
1940 6 : fd_quic_conn_id_t const * orig_dst_conn_id = &conn->peer_cids[0];
1941 6 : uchar const * retry_token = NULL;
1942 6 : ulong retry_token_sz = 0UL;
1943 :
1944 6 : int rc = fd_quic_retry_client_verify(
1945 6 : cur_ptr, cur_sz,
1946 6 : orig_dst_conn_id,
1947 6 : &conn->retry_src_conn_id,
1948 6 : &retry_token, &retry_token_sz
1949 6 : );
1950 6 : if( FD_UNLIKELY( rc!=FD_QUIC_SUCCESS ) ) {
1951 0 : quic->metrics.conn_err_retry_fail_cnt++;
1952 0 : return FD_QUIC_PARSE_FAIL;
1953 0 : }
1954 :
1955 : /* Update the peer using the retry src conn id */
1956 6 : conn->peer_cids[0] = conn->retry_src_conn_id;
1957 :
1958 : /* Re-send the ClientHello */
1959 6 : conn->hs_sent_bytes[fd_quic_enc_level_initial_id] = 0;
1960 :
1961 : /* Need to regenerate keys using the retry source connection id */
1962 6 : fd_quic_gen_initial_secret_and_keys( conn, &conn->retry_src_conn_id, /* is_server */ 0 );
1963 :
1964 : /* The token length is the remaining bytes in the retry packet after subtracting known fields. */
1965 6 : conn->token_len = retry_token_sz;
1966 6 : fd_memcpy( &conn->token, retry_token, conn->token_len );
1967 :
1968 : /* have to rewind the handshake data */
1969 6 : uint enc_level = fd_quic_enc_level_initial_id;
1970 6 : conn->hs_sent_bytes[enc_level] = 0;
1971 :
1972 : /* send the INITIAL */
1973 6 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
1974 :
1975 6 : fd_quic_svc_prep_schedule_now( conn );
1976 :
1977 6 : return cur_sz;
1978 6 : }
1979 :
1980 : ulong
1981 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 ) {
1982 78 : (void)pkt;
1983 78 : (void)quic;
1984 78 : (void)cur_ptr;
1985 78 : (void)cur_sz;
1986 : /* since we do not support zero-rtt, simply fail the packet */
1987 78 : if( conn ) {
1988 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_INTERNAL_ERROR, __LINE__ );
1989 0 : }
1990 78 : return FD_QUIC_PARSE_FAIL;
1991 78 : }
1992 :
1993 : int
1994 : fd_quic_lazy_ack_pkt( fd_quic_t * quic,
1995 : fd_quic_conn_t * conn,
1996 76955408 : fd_quic_pkt_t const * pkt ) {
1997 76955408 : if( pkt->ack_flag & ACK_FLAG_CANCEL ) {
1998 0 : return FD_QUIC_ACK_TX_CANCEL;
1999 0 : }
2000 :
2001 76955408 : fd_quic_state_t * state = fd_quic_get_state( quic );
2002 76955408 : fd_quic_ack_gen_t * ack_gen = conn->ack_gen;
2003 76955408 : int res = fd_quic_ack_pkt( conn->ack_gen, pkt->pkt_number, pkt->enc_level, state->now );
2004 76955408 : conn->ack_gen->is_elicited |= fd_uchar_if( pkt->ack_flag & ACK_FLAG_RQD, 1, 0 );
2005 :
2006 : /* Trigger immediate ACK send? */
2007 76955408 : int ack_sz_threshold_hit = conn->unacked_sz > quic->config.ack_threshold;
2008 76955408 : int force_instant_ack =
2009 76955408 : ( !!(pkt->ack_flag & ACK_FLAG_RQD) ) &
2010 76955408 : ( ( pkt->enc_level == fd_quic_enc_level_initial_id ) |
2011 76955408 : ( pkt->enc_level == fd_quic_enc_level_handshake_id ) );
2012 76955408 : if( ack_sz_threshold_hit | force_instant_ack ) {
2013 231735 : conn->unacked_sz = 0UL;
2014 231735 : fd_quic_svc_prep_schedule( conn, state->now );
2015 76723673 : } else if( ack_gen->is_elicited ) {
2016 76509146 : fd_quic_svc_prep_schedule( conn, state->now + quic->config.ack_delay );
2017 76509146 : }
2018 :
2019 76955408 : return res;
2020 76955408 : }
2021 :
2022 : /* This thunk works around a compiler bug (bogus stringop-overflow warning) in GCC 11 */
2023 : __attribute__((noinline)) static void
2024 96 : fd_quic_key_update_derive1( fd_quic_conn_t * conn ) {
2025 96 : fd_quic_key_update_derive( &conn->secrets, conn->new_keys );
2026 96 : }
2027 :
2028 : static void
2029 96 : fd_quic_key_update_complete( fd_quic_conn_t * conn ) {
2030 : /* Key updates are only possible for 1-RTT packets, which are appdata */
2031 96 : ulong const enc_level = fd_quic_enc_level_appdata_id;
2032 :
2033 : /* Update payload keys */
2034 96 : memcpy( conn->keys[enc_level][0].pkt_key, conn->new_keys[0].pkt_key, FD_AES_128_KEY_SZ );
2035 96 : memcpy( conn->keys[enc_level][0].iv, conn->new_keys[0].iv, FD_AES_GCM_IV_SZ );
2036 96 : memcpy( conn->keys[enc_level][1].pkt_key, conn->new_keys[1].pkt_key, FD_AES_128_KEY_SZ );
2037 96 : memcpy( conn->keys[enc_level][1].iv, conn->new_keys[1].iv, FD_AES_GCM_IV_SZ );
2038 :
2039 : /* Update IVs */
2040 96 : memcpy( conn->secrets.secret[enc_level][0], conn->secrets.new_secret[0], FD_QUIC_SECRET_SZ );
2041 96 : memcpy( conn->secrets.secret[enc_level][1], conn->secrets.new_secret[1], FD_QUIC_SECRET_SZ );
2042 :
2043 : /* Packet header encryption keys are not updated */
2044 :
2045 : /* Wind up for next key phase update */
2046 96 : conn->key_phase = !conn->key_phase;
2047 96 : conn->key_update = 0;
2048 96 : fd_quic_key_update_derive1( conn );
2049 :
2050 96 : FD_DEBUG( FD_LOG_DEBUG(( "key update completed" )); )
2051 96 : }
2052 :
2053 : ulong
2054 : fd_quic_handle_v1_one_rtt( fd_quic_t * quic,
2055 : fd_quic_conn_t * conn,
2056 : fd_quic_pkt_t * pkt,
2057 : uchar * const cur_ptr,
2058 13785203 : ulong const tot_sz ) {
2059 13785203 : fd_quic_state_t * state = fd_quic_get_state( quic );
2060 :
2061 13785203 : if( !conn ) {
2062 12888 : quic->metrics.pkt_no_conn_cnt[ fd_quic_enc_level_appdata_id ]++;
2063 12888 : FD_DTRACE_PROBE_2( fd_quic_handle_v1_one_rtt_no_conn , state->now, pkt->pkt_number );
2064 12888 : return FD_QUIC_PARSE_FAIL;
2065 12888 : }
2066 13772315 : if( FD_UNLIKELY( conn->state==FD_QUIC_CONN_STATE_INVALID ||
2067 13772315 : !fd_uint_extract_bit( conn->keys_avail, fd_quic_enc_level_appdata_id ) ) ) {
2068 3 : quic->metrics.pkt_no_key_cnt[ fd_quic_enc_level_appdata_id ]++;
2069 3 : return FD_QUIC_PARSE_FAIL;
2070 3 : }
2071 :
2072 13772312 : if( FD_UNLIKELY( tot_sz < (1+FD_QUIC_CONN_ID_SZ+1) ) ) {
2073 : /* One-RTT header: 1 byte
2074 : DCID: FD_QUIC_CONN_ID_SZ
2075 : Pkt number: 1-4 bytes */
2076 0 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_appdata_id ]++;
2077 0 : return FD_QUIC_PARSE_FAIL;
2078 0 : }
2079 13772312 : ulong pn_offset = 1UL + FD_QUIC_CONN_ID_SZ;
2080 :
2081 13772312 : pkt->enc_level = fd_quic_enc_level_appdata_id;
2082 :
2083 13772312 : # if !FD_QUIC_DISABLE_CRYPTO
2084 13772312 : if( FD_UNLIKELY(
2085 13772312 : fd_quic_crypto_decrypt_hdr( cur_ptr, tot_sz,
2086 13772312 : pn_offset,
2087 13772312 : &conn->keys[3][0] ) != FD_QUIC_SUCCESS ) ) {
2088 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_crypto_decrypt_hdr failed" )) );
2089 0 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_appdata_id ]++;
2090 0 : return FD_QUIC_PARSE_FAIL;
2091 0 : }
2092 13772312 : # endif /* !FD_QUIC_DISABLE_CRYPTO */
2093 :
2094 13772312 : uint pkt_number_sz = fd_quic_h0_pkt_num_len( cur_ptr[0] ) + 1u;
2095 13772312 : uint key_phase = fd_quic_one_rtt_key_phase( cur_ptr[0] );
2096 :
2097 : /* reconstruct packet number */
2098 13772312 : ulong pktnum_comp = fd_quic_pktnum_decode( cur_ptr+pn_offset, pkt_number_sz );
2099 13772312 : ulong pkt_number = fd_quic_reconstruct_pkt_num( pktnum_comp, pkt_number_sz, conn->exp_pkt_number[2] );
2100 :
2101 : /* NOTE from rfc9002 s3
2102 : It is permitted for some packet numbers to never be used, leaving intentional gaps. */
2103 :
2104 : /* is current packet in the current key phase? */
2105 13772312 : int current_key_phase = conn->key_phase == key_phase;
2106 :
2107 13772312 : # if !FD_QUIC_DISABLE_CRYPTO
2108 : /* If the key phase bit flips, decrypt with the new pair of keys
2109 : instead. Note that the key phase bit is untrusted at this point. */
2110 13772312 : fd_quic_crypto_keys_t * keys = current_key_phase ? &conn->keys[3][0] : &conn->new_keys[0];
2111 :
2112 : /* this decrypts the header and payload */
2113 13772312 : if( FD_UNLIKELY(
2114 13772312 : fd_quic_crypto_decrypt( cur_ptr, tot_sz,
2115 13772312 : pn_offset,
2116 13772312 : pkt_number,
2117 13772312 : keys ) != FD_QUIC_SUCCESS ) ) {
2118 : /* remove connection from map, and insert into free list */
2119 0 : FD_DTRACE_PROBE_3( quic_err_decrypt_1rtt_pkt, pkt->ip4, conn->our_conn_id, pkt->pkt_number );
2120 0 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_appdata_id ]++;
2121 0 : return FD_QUIC_PARSE_FAIL;
2122 0 : }
2123 13772312 : # endif /* !FD_QUIC_DISABLE_CRYPTO */
2124 :
2125 : /* set packet number on the context */
2126 13772312 : pkt->pkt_number = pkt_number;
2127 :
2128 13772312 : if( !current_key_phase ) {
2129 : /* Decryption succeeded. Commit the key phase update and throw
2130 : away the old keys. (May cause a few decryption failures if old
2131 : packets get reordered past the current incoming packet) */
2132 96 : fd_quic_key_update_complete( conn );
2133 96 : }
2134 :
2135 13772312 : conn->peer_enc_level = (uchar)fd_uchar_max( conn->peer_enc_level, fd_quic_enc_level_appdata_id );
2136 :
2137 : /* handle frames */
2138 13772312 : ulong payload_off = pn_offset + pkt_number_sz;
2139 13772312 : uchar const * frame_ptr = cur_ptr + payload_off;
2140 13772312 : ulong payload_sz = tot_sz - pn_offset - pkt_number_sz; /* includes auth tag */
2141 13772312 : if( FD_UNLIKELY( payload_sz<FD_QUIC_CRYPTO_TAG_SZ ) ) return FD_QUIC_PARSE_FAIL;
2142 13772312 : ulong frame_sz = payload_sz - FD_QUIC_CRYPTO_TAG_SZ; /* total size of all frames in packet */
2143 27544630 : while( frame_sz != 0UL ) {
2144 13772318 : ulong rc = fd_quic_handle_v1_frame(
2145 13772318 : quic, conn, pkt, FD_QUIC_PKT_TYPE_ONE_RTT,
2146 13772318 : frame_ptr, frame_sz );
2147 13772318 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2148 0 : FD_DEBUG( FD_LOG_DEBUG(( "Failed to handle frame (1-RTT, frame=0x%02x)", frame_ptr[0] )) );
2149 0 : quic->metrics.frame_rx_err_cnt++;
2150 0 : return FD_QUIC_PARSE_FAIL;
2151 0 : }
2152 :
2153 13772318 : if( FD_UNLIKELY( rc == 0UL || rc > frame_sz ) ) {
2154 0 : FD_LOG_WARNING(( "fd_quic_handle_v1_frame returned invalid size" ));
2155 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
2156 0 : return FD_QUIC_PARSE_FAIL;
2157 0 : }
2158 :
2159 : /* next frame, and remaining size */
2160 13772318 : frame_ptr += rc;
2161 13772318 : frame_sz -= rc;
2162 13772318 : }
2163 :
2164 : /* update last activity */
2165 13772312 : conn->last_activity = fd_quic_get_state( quic )->now;
2166 :
2167 : /* update expected packet number */
2168 13772312 : conn->exp_pkt_number[2] = fd_ulong_max( conn->exp_pkt_number[2], pkt_number+1UL );
2169 :
2170 13772312 : return tot_sz;
2171 13772312 : }
2172 :
2173 :
2174 : /* process v1 quic packets
2175 : returns number of bytes consumed, or FD_QUIC_PARSE_FAIL upon error */
2176 : ulong
2177 : fd_quic_process_quic_packet_v1( fd_quic_t * quic,
2178 : fd_quic_pkt_t * pkt,
2179 : uchar * cur_ptr,
2180 13814294 : ulong cur_sz ) {
2181 :
2182 : /* bounds check packet size */
2183 13814294 : if( FD_UNLIKELY( cur_sz < FD_QUIC_SHORTEST_PKT ) ) {
2184 0 : quic->metrics.pkt_undersz_cnt++;
2185 0 : return FD_QUIC_PARSE_FAIL;
2186 0 : }
2187 13814294 : if( FD_UNLIKELY( cur_sz > 1500 ) ) {
2188 681 : quic->metrics.pkt_oversz_cnt++;
2189 681 : return FD_QUIC_PARSE_FAIL;
2190 681 : }
2191 :
2192 13813613 : fd_quic_state_t * state = fd_quic_get_state( quic );
2193 13813613 : fd_quic_conn_t * conn = NULL;
2194 :
2195 :
2196 : /* keep end */
2197 13813613 : uchar * orig_ptr = cur_ptr;
2198 :
2199 : /* No need for cur_sz check, since we are safe from the above check.
2200 : Decrementing cur_sz is done in the long header branch, the short header
2201 : branch parses the first byte again using the parser generator.
2202 : */
2203 13813613 : uchar hdr_form = fd_quic_h0_hdr_form( *cur_ptr );
2204 13813613 : ulong rc;
2205 :
2206 13813613 : if( hdr_form ) { /* long header */
2207 28413 : fd_quic_long_hdr_t long_hdr[1];
2208 28413 : rc = fd_quic_decode_long_hdr( long_hdr, cur_ptr+1, cur_sz-1 );
2209 28413 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2210 360 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_decode_long_hdr failed" )); )
2211 360 : quic->metrics.pkt_quic_hdr_err_cnt++;
2212 360 : return FD_QUIC_PARSE_FAIL;
2213 360 : }
2214 :
2215 28053 : fd_quic_conn_id_t dcid = fd_quic_conn_id_new( long_hdr->dst_conn_id, long_hdr->dst_conn_id_len );
2216 28053 : if( dcid.sz == FD_QUIC_CONN_ID_SZ ) {
2217 27192 : conn = fd_quic_conn_query( state->conn_map, fd_ulong_load_8( dcid.conn_id ) );
2218 27192 : }
2219 28053 : fd_quic_conn_id_t scid = fd_quic_conn_id_new( long_hdr->src_conn_id, long_hdr->src_conn_id_len );
2220 :
2221 28053 : uchar long_packet_type = fd_quic_h0_long_packet_type( *cur_ptr );
2222 :
2223 : /* encryption level matches that of TLS */
2224 28053 : pkt->enc_level = long_packet_type; /* V2 uses an indirect mapping */
2225 :
2226 : /* initialize packet number to unused value */
2227 28053 : pkt->pkt_number = FD_QUIC_PKT_NUM_UNUSED;
2228 :
2229 28053 : switch( long_packet_type ) {
2230 15603 : case FD_QUIC_PKT_TYPE_INITIAL:
2231 15603 : rc = fd_quic_handle_v1_initial( quic, &conn, pkt, &dcid, &scid, cur_ptr, cur_sz );
2232 15603 : if( FD_UNLIKELY( !conn ) ) {
2233 : /* FIXME not really a fail - Could be a retry */
2234 3402 : return FD_QUIC_PARSE_FAIL;
2235 3402 : }
2236 12201 : break;
2237 12222 : case FD_QUIC_PKT_TYPE_HANDSHAKE:
2238 12222 : rc = fd_quic_handle_v1_handshake( quic, conn, pkt, cur_ptr, cur_sz );
2239 12222 : break;
2240 150 : case FD_QUIC_PKT_TYPE_RETRY:
2241 150 : rc = fd_quic_handle_v1_retry( quic, conn, pkt, cur_ptr, cur_sz );
2242 150 : break;
2243 78 : case FD_QUIC_PKT_TYPE_ZERO_RTT:
2244 78 : rc = fd_quic_handle_v1_zero_rtt( quic, conn, pkt, cur_ptr, cur_sz );
2245 78 : break;
2246 28053 : }
2247 :
2248 24651 : fd_quic_svc_timers_schedule( state->svc_timers, conn, state->now );
2249 :
2250 24651 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2251 405 : FD_DEBUG( FD_LOG_DEBUG(( "Rejected packet (type=%d)", long_packet_type )); )
2252 405 : return FD_QUIC_PARSE_FAIL;
2253 405 : }
2254 :
2255 13785200 : } else { /* short header */
2256 : /* encryption level of short header packets is fd_quic_enc_level_appdata_id */
2257 13785200 : pkt->enc_level = fd_quic_enc_level_appdata_id;
2258 :
2259 : /* initialize packet number to unused value */
2260 13785200 : pkt->pkt_number = FD_QUIC_PKT_NUM_UNUSED;
2261 :
2262 : /* find connection id */
2263 13785200 : ulong dst_conn_id = fd_ulong_load_8( cur_ptr+1 );
2264 13785200 : conn = fd_quic_conn_query( state->conn_map, dst_conn_id );
2265 13785200 : rc = fd_quic_handle_v1_one_rtt( quic, conn, pkt, cur_ptr, cur_sz );
2266 :
2267 13785200 : fd_quic_svc_timers_schedule( state->svc_timers, conn, state->now );
2268 :
2269 13785200 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2270 12888 : return FD_QUIC_PARSE_FAIL;
2271 12888 : }
2272 13785200 : }
2273 :
2274 13796558 : if( FD_UNLIKELY( rc == 0UL ) ) {
2275 : /* this is an error because it causes infinite looping */
2276 0 : return FD_QUIC_PARSE_FAIL;
2277 0 : }
2278 13796558 : cur_ptr += rc;
2279 :
2280 : /* if we get here we parsed all the frames, so ack the packet */
2281 13796558 : int ack_type = fd_quic_lazy_ack_pkt( quic, conn, pkt );
2282 13796558 : quic->metrics.ack_tx[ ack_type ]++;
2283 :
2284 : /* fd_quic_lazy_ack_pkt may have prepped schedule */
2285 13796558 : fd_quic_svc_timers_schedule( state->svc_timers, conn, state->now );
2286 :
2287 13796558 : if( pkt->rtt_ack_time ) {
2288 15 : fd_quic_sample_rtt( conn, (long)pkt->rtt_ack_time, (long)pkt->rtt_ack_delay );
2289 15 : }
2290 :
2291 : /* return bytes consumed */
2292 13796558 : return (ulong)( cur_ptr - orig_ptr );
2293 13796558 : }
2294 :
2295 :
2296 : /* version negotiation packet has version 0 */
2297 : static inline int
2298 23679 : is_version_invalid( fd_quic_t * quic, uint version ) {
2299 23679 : if( version == 0 ) {
2300 : /* TODO implement version negotiation */
2301 423 : quic->metrics.pkt_verneg_cnt++;
2302 423 : FD_DEBUG( FD_LOG_DEBUG(( "Got version negotiation packet" )) );
2303 423 : return 1;
2304 423 : }
2305 :
2306 : /* 0x?a?a?a?au is intended to force version negotiation
2307 : TODO implement */
2308 23256 : if( ( version & 0x0a0a0a0au ) == 0x0a0a0a0au ) {
2309 : /* at present, ignore */
2310 3 : quic->metrics.pkt_verneg_cnt++;
2311 3 : FD_DEBUG( FD_LOG_DEBUG(( "Got version negotiation packet (forced)" )) );
2312 3 : return 1;
2313 3 : }
2314 :
2315 23253 : if( version != 1 ) {
2316 : /* cannot interpret length, so discard entire packet */
2317 : /* TODO send version negotiation */
2318 219 : quic->metrics.pkt_verneg_cnt++;
2319 219 : FD_DEBUG( FD_LOG_DEBUG(( "Got unknown version QUIC packet" )) );
2320 219 : return 1;
2321 219 : }
2322 23034 : return 0;
2323 23253 : }
2324 :
2325 : static inline void
2326 : fd_quic_process_packet_impl( fd_quic_t * quic,
2327 : uchar * data,
2328 : ulong data_sz,
2329 13815308 : long now ) {
2330 13815308 : fd_quic_get_state( quic )->now = now;
2331 13815308 : quic->metrics.net_rx_byte_cnt += data_sz;
2332 13815308 : quic->metrics.net_rx_pkt_cnt++;
2333 :
2334 13815308 : ulong rc = 0;
2335 :
2336 : /* holds the remainder of the packet*/
2337 13815308 : uchar * cur_ptr = data;
2338 13815308 : ulong cur_sz = data_sz;
2339 :
2340 13815308 : if( FD_UNLIKELY( data_sz > 0xffffu ) ) {
2341 0 : FD_DTRACE_PROBE( quic_err_rx_oversz );
2342 0 : quic->metrics.pkt_oversz_cnt++;
2343 0 : return;
2344 0 : }
2345 :
2346 13815308 : fd_quic_pkt_t pkt = { .datagram_sz = (uint)data_sz };
2347 :
2348 13815308 : pkt.rcv_time = now;
2349 13815308 : pkt.rtt_pkt_number = 0;
2350 13815308 : pkt.rtt_ack_time = 0;
2351 :
2352 : /* parse ip, udp */
2353 :
2354 13815308 : rc = fd_quic_decode_ip4( pkt.ip4, cur_ptr, cur_sz );
2355 13815308 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2356 : /* TODO count failure */
2357 0 : FD_DTRACE_PROBE( quic_err_rx_net_hdr );
2358 0 : quic->metrics.pkt_net_hdr_err_cnt++;
2359 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_decode_ip4 failed" )) );
2360 0 : return;
2361 0 : }
2362 :
2363 : /* check version, tot_len, protocol, checksum? */
2364 13815308 : if( FD_UNLIKELY( pkt.ip4->protocol != FD_IP4_HDR_PROTOCOL_UDP ) ) {
2365 0 : FD_DTRACE_PROBE( quic_err_rx_net_hdr );
2366 0 : quic->metrics.pkt_net_hdr_err_cnt++;
2367 0 : FD_DEBUG( FD_LOG_DEBUG(( "Packet is not UDP" )) );
2368 0 : return;
2369 0 : }
2370 :
2371 : /* verify ip4 packet isn't truncated
2372 : * AF_XDP can silently do this */
2373 13815308 : if( FD_UNLIKELY( pkt.ip4->net_tot_len > cur_sz ) ) {
2374 0 : FD_DTRACE_PROBE( quic_err_rx_net_hdr );
2375 0 : quic->metrics.pkt_net_hdr_err_cnt++;
2376 0 : FD_DEBUG( FD_LOG_DEBUG(( "IPv4 header indicates truncation" )) );
2377 0 : return;
2378 0 : }
2379 :
2380 : /* update pointer + size */
2381 13815308 : cur_ptr += rc;
2382 13815308 : cur_sz -= rc;
2383 :
2384 13815308 : rc = fd_quic_decode_udp( pkt.udp, cur_ptr, cur_sz );
2385 13815308 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2386 : /* TODO count failure */
2387 0 : FD_DTRACE_PROBE( quic_err_rx_net_hdr );
2388 0 : quic->metrics.pkt_net_hdr_err_cnt++;
2389 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_decode_udp failed" )) );
2390 0 : return;
2391 0 : }
2392 :
2393 : /* sanity check udp length */
2394 13815308 : if( FD_UNLIKELY( pkt.udp->net_len < sizeof(fd_udp_hdr_t) ||
2395 13815308 : pkt.udp->net_len > cur_sz ) ) {
2396 0 : FD_DTRACE_PROBE( quic_err_rx_net_hdr );
2397 0 : quic->metrics.pkt_net_hdr_err_cnt++;
2398 0 : FD_DEBUG( FD_LOG_DEBUG(( "UDP header indicates truncation" )) );
2399 0 : return;
2400 0 : }
2401 :
2402 : /* update pointer + size */
2403 13815308 : cur_ptr += rc;
2404 13815308 : cur_sz = pkt.udp->net_len - rc; /* replace with udp length */
2405 :
2406 : /* cur_ptr[0..cur_sz-1] should be payload */
2407 :
2408 : /* filter */
2409 : /* check dst eth address, ip address? probably not necessary */
2410 : /* usually look up port here, but let's jump straight into decoding as-if
2411 : quic */
2412 :
2413 : /* update counters */
2414 :
2415 : /* shortest valid quic payload? */
2416 13815308 : if( FD_UNLIKELY( cur_sz < FD_QUIC_SHORTEST_PKT ) ) {
2417 6639 : FD_DTRACE_PROBE( quic_err_rx_net_hdr );
2418 6639 : quic->metrics.pkt_net_hdr_err_cnt++;
2419 6639 : FD_DEBUG( FD_LOG_DEBUG(( "Undersize QUIC packet" )) );
2420 6639 : return;
2421 6639 : }
2422 :
2423 13808669 : fd_quic_state_t * state = fd_quic_get_state( quic );
2424 :
2425 : /* short packets don't have version */
2426 13808669 : int long_pkt = !!( (uint)cur_ptr[0] & 0x80u );
2427 :
2428 13808669 : if( long_pkt ) {
2429 : /* version at offset 1..4 */
2430 23679 : uint version = fd_uint_bswap( FD_LOAD( uint, cur_ptr + 1 ) );
2431 : /* we only support version 1 */
2432 23679 : if( FD_UNLIKELY( is_version_invalid( quic, version ) ) ) {
2433 645 : return;
2434 645 : }
2435 :
2436 : /* multiple QUIC packets in a UDP packet */
2437 : /* shortest valid quic payload? */
2438 23034 : ulong pkt_idx;
2439 47280 : for( pkt_idx=0UL; pkt_idx<FD_QUIC_PKT_COALESCE_LIMIT; pkt_idx++ ) {
2440 : /* Are we done? Omit short packet handling that follows */
2441 47280 : if( FD_UNLIKELY( cur_sz < FD_QUIC_SHORTEST_PKT ) ) return;
2442 :
2443 : /* short packet requires different handling */
2444 29094 : int short_pkt = !( (uint)cur_ptr[0] & 0x80u );
2445 :
2446 29094 : if( FD_UNLIKELY( short_pkt ) ) break;
2447 :
2448 : /* check version */
2449 29094 : uint cur_version = fd_uint_bswap( FD_LOAD( uint, cur_ptr + 1 ) );
2450 :
2451 29094 : if( cur_version != version ) {
2452 : /* multiple versions in a single connection is a violation, and by
2453 : extension so is multiple versions in a single udp datagram
2454 : these are silently ignored
2455 :
2456 : for reference
2457 : all quic packets in a udp datagram must be for the same connection id
2458 : (section 12.2) and therefore the same connection
2459 : all packets on a connection must be of the same version (5.2) */
2460 0 : quic->metrics.pkt_quic_hdr_err_cnt++;
2461 0 : FD_DEBUG( FD_LOG_DEBUG(( "Mixed QUIC versions in packet" )) );
2462 0 : return;
2463 0 : }
2464 :
2465 29094 : rc = fd_quic_process_quic_packet_v1( quic, &pkt, cur_ptr, cur_sz );
2466 29094 : svc_cnt_eq_alloc_conn( state->svc_timers, quic );
2467 :
2468 : /* 0UL means no progress, so fail */
2469 29094 : if( FD_UNLIKELY( ( rc == FD_QUIC_PARSE_FAIL ) |
2470 29094 : ( rc == 0UL ) ) ) {
2471 4848 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_process_quic_packet_v1 failed (stuck=%d)", rc==0UL )) );
2472 4848 : return;
2473 4848 : }
2474 :
2475 24246 : if( FD_UNLIKELY( rc > cur_sz ) ) {
2476 0 : FD_DEBUG( FD_LOG_WARNING(( "fd_quic_process_quic_packet_v1 read too much" )) );
2477 0 : return;
2478 0 : }
2479 :
2480 : /* return code (rc) is the number of bytes consumed */
2481 24246 : cur_sz -= rc;
2482 24246 : cur_ptr += rc;
2483 24246 : }
2484 0 : if( pkt_idx==FD_QUIC_PKT_COALESCE_LIMIT ) {
2485 : /* too many packets in a single udp datagram */
2486 0 : return;
2487 0 : }
2488 0 : }
2489 :
2490 : /* above can drop out of loop if a short packet is detected */
2491 13784990 : if( FD_UNLIKELY( cur_sz < FD_QUIC_SHORTEST_PKT ) ) return;
2492 :
2493 : /* short header packet
2494 : only one_rtt packets currently have short headers */
2495 13784990 : fd_quic_process_quic_packet_v1( quic, &pkt, cur_ptr, cur_sz );
2496 13784990 : svc_cnt_eq_alloc_conn( state->svc_timers, quic );
2497 13784990 : }
2498 :
2499 : void
2500 : fd_quic_process_packet( fd_quic_t * quic,
2501 : uchar * data,
2502 : ulong data_sz,
2503 13815308 : long now ) {
2504 13815308 : long now_ticks = fd_tickcount();
2505 13815308 : fd_quic_process_packet_impl( quic, data, data_sz, now );
2506 13815308 : long delta_ticks = fd_tickcount() - now_ticks;
2507 13815308 : fd_histf_sample( quic->metrics.receive_duration, (ulong)delta_ticks );
2508 13815308 : }
2509 :
2510 : /* main receive-side entry point */
2511 : int
2512 : fd_quic_aio_cb_receive( void * context,
2513 : fd_aio_pkt_info_t const * batch,
2514 : ulong batch_cnt,
2515 : ulong * opt_batch_idx,
2516 13796297 : int flush ) {
2517 13796297 : (void)flush;
2518 :
2519 13796297 : fd_quic_t * quic = context;
2520 13796297 : long now = fd_quic_get_state( quic )->now;
2521 :
2522 : /* this aio interface is configured as one-packet per buffer
2523 : so batch[0] refers to one buffer
2524 : as such, we simply forward each individual packet to a handling function */
2525 27592594 : for( ulong j = 0; j < batch_cnt; ++j ) {
2526 13796297 : fd_quic_process_packet( quic, batch[ j ].buf, batch[ j ].buf_sz, now );
2527 13796297 : }
2528 :
2529 : /* the assumption here at present is that any packet that could not be processed
2530 : is simply dropped
2531 : hence, all packets were consumed */
2532 13796297 : if( FD_LIKELY( opt_batch_idx ) ) {
2533 0 : *opt_batch_idx = batch_cnt;
2534 0 : }
2535 :
2536 13796297 : return FD_AIO_SUCCESS;
2537 13796297 : }
2538 :
2539 : void
2540 : fd_quic_tls_cb_alert( fd_quic_tls_hs_t * hs,
2541 : void * context,
2542 0 : int alert ) {
2543 0 : (void)hs;
2544 0 : fd_quic_conn_t * conn = (fd_quic_conn_t *)context;
2545 0 : (void)conn;
2546 0 : (void)alert;
2547 0 : FD_DEBUG( FD_LOG_DEBUG(( "TLS callback: %s", conn->server ? "SERVER" : "CLIENT" ));
2548 0 : FD_LOG_DEBUG(( "TLS alert: (%d-%s)", alert, fd_tls_alert_cstr( (uint)alert ) )); );
2549 :
2550 : /* TODO store alert to reply to peer */
2551 0 : }
2552 :
2553 : void
2554 : fd_quic_tls_cb_secret( fd_quic_tls_hs_t * hs,
2555 : void * context,
2556 24240 : fd_quic_tls_secret_t const * secret ) {
2557 :
2558 24240 : fd_quic_conn_t * conn = (fd_quic_conn_t*)context;
2559 24240 : fd_quic_t * quic = conn->quic;
2560 :
2561 : /* look up suite */
2562 : /* set secrets */
2563 24240 : FD_TEST( secret->enc_level < FD_QUIC_NUM_ENC_LEVELS );
2564 :
2565 24240 : uint enc_level = secret->enc_level;
2566 :
2567 24240 : fd_quic_crypto_secrets_t * crypto_secret = &conn->secrets;
2568 :
2569 24240 : memcpy( crypto_secret->secret[enc_level][0], secret->read_secret, FD_QUIC_SECRET_SZ );
2570 24240 : memcpy( crypto_secret->secret[enc_level][1], secret->write_secret, FD_QUIC_SECRET_SZ );
2571 :
2572 24240 : conn->keys_avail = fd_uint_set_bit( conn->keys_avail, (int)enc_level );
2573 :
2574 : /* gen local keys */
2575 24240 : fd_quic_gen_keys(
2576 24240 : &conn->keys[enc_level][0],
2577 24240 : conn->secrets.secret[enc_level][0] );
2578 :
2579 : /* gen peer keys */
2580 24240 : fd_quic_gen_keys(
2581 24240 : &conn->keys[enc_level][1],
2582 24240 : conn->secrets.secret[enc_level][1] );
2583 :
2584 24240 : if( enc_level==fd_quic_enc_level_appdata_id ) {
2585 12120 : fd_quic_key_update_derive( &conn->secrets, conn->new_keys );
2586 12120 : }
2587 :
2588 : /* Key logging */
2589 :
2590 24240 : void * keylog_ctx = quic->cb.quic_ctx;
2591 24240 : fd_quic_cb_tls_keylog_t keylog_fn = quic->cb.tls_keylog;
2592 24240 : if( FD_UNLIKELY( keylog_fn ) ) {
2593 : /* Ignore stdout, stderr, stdin */
2594 :
2595 24240 : uchar const * recv_secret = secret->read_secret;
2596 24240 : uchar const * send_secret = secret->write_secret;
2597 :
2598 24240 : uchar const * client_secret = hs->is_server ? recv_secret : send_secret;
2599 24240 : uchar const * server_secret = hs->is_server ? send_secret : recv_secret;
2600 :
2601 24240 : char buf[256];
2602 24240 : char * s;
2603 24240 : switch( enc_level ) {
2604 12120 : case FD_TLS_LEVEL_HANDSHAKE:
2605 12120 : /* 0 chars */ s = fd_cstr_init( buf );
2606 12120 : /* 0+32 chars */ s = fd_cstr_append_cstr( s, "CLIENT_HANDSHAKE_TRAFFIC_SECRET " );
2607 12120 : /* 32+64 chars */ s = fd_hex_encode( s, hs->hs.base.client_random, 32UL );
2608 12120 : /* 96+ 1 chars */ s = fd_cstr_append_char( s, ' ' );
2609 12120 : /* 97+64 chars */ s = fd_hex_encode( s, client_secret, 32UL );
2610 12120 : /* 161 chars */ fd_cstr_fini( s );
2611 12120 : keylog_fn( keylog_ctx, buf );
2612 12120 : /* 0 chars */ s = fd_cstr_init( buf );
2613 12120 : /* 0+32 chars */ s = fd_cstr_append_cstr( s, "SERVER_HANDSHAKE_TRAFFIC_SECRET " );
2614 12120 : /* 32+64 chars */ s = fd_hex_encode( s, hs->hs.base.client_random, 32UL );
2615 12120 : /* 96+ 1 chars */ s = fd_cstr_append_char( s, ' ' );
2616 12120 : /* 97+64 chars */ s = fd_hex_encode( s, server_secret, 32UL );
2617 12120 : /* 161 chars */ fd_cstr_fini( s );
2618 12120 : keylog_fn( keylog_ctx, buf );
2619 12120 : break;
2620 12120 : case FD_TLS_LEVEL_APPLICATION:
2621 12120 : /* 0 chars */ s = fd_cstr_init( buf );
2622 12120 : /* 0+24 chars */ s = fd_cstr_append_cstr( s, "CLIENT_TRAFFIC_SECRET_0 " );
2623 12120 : /* 24+64 chars */ s = fd_hex_encode( s, hs->hs.base.client_random, 32UL );
2624 12120 : /* 88+ 1 chars */ s = fd_cstr_append_char( s, ' ' );
2625 12120 : /* 89+64 chars */ s = fd_hex_encode( s, client_secret, 32UL );
2626 12120 : /* 153 chars */ fd_cstr_fini( s );
2627 12120 : keylog_fn( keylog_ctx, buf );
2628 12120 : /* 0 chars */ s = fd_cstr_init( buf );
2629 12120 : /* 0+24 chars */ s = fd_cstr_append_cstr( s, "SERVER_TRAFFIC_SECRET_0 " );
2630 12120 : /* 24+64 chars */ s = fd_hex_encode( s, hs->hs.base.client_random, 32UL );
2631 12120 : /* 88+ 1 chars */ s = fd_cstr_append_char( s, ' ' );
2632 12120 : /* 89+64 chars */ s = fd_hex_encode( s, server_secret, 32UL );
2633 12120 : /* 153 chars */ fd_cstr_fini( s );
2634 12120 : keylog_fn( keylog_ctx, buf );
2635 12120 : break;
2636 24240 : }
2637 24240 : }
2638 :
2639 24240 : }
2640 :
2641 : void
2642 : fd_quic_apply_peer_params( fd_quic_conn_t * conn,
2643 12126 : fd_quic_transport_params_t const * peer_tp ) {
2644 : /* flow control parameters */
2645 12126 : conn->tx_max_data = peer_tp->initial_max_data;
2646 12126 : conn->tx_initial_max_stream_data_uni= peer_tp->initial_max_stream_data_uni;
2647 :
2648 12126 : if( !conn->server ) {
2649 : /* verify retry_src_conn_id */
2650 6063 : uint retry_src_conn_id_sz = conn->retry_src_conn_id.sz;
2651 6063 : if( retry_src_conn_id_sz ) {
2652 6 : if( FD_UNLIKELY( !peer_tp->retry_source_connection_id_present
2653 6 : || peer_tp->retry_source_connection_id_len != retry_src_conn_id_sz
2654 6 : || 0 != memcmp( peer_tp->retry_source_connection_id,
2655 6 : conn->retry_src_conn_id.conn_id,
2656 6 : retry_src_conn_id_sz ) ) ) {
2657 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_TRANSPORT_PARAMETER_ERROR, __LINE__ );
2658 0 : return;
2659 0 : }
2660 6057 : } else {
2661 6057 : if( FD_UNLIKELY( peer_tp->retry_source_connection_id_present ) ) {
2662 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_TRANSPORT_PARAMETER_ERROR, __LINE__ );
2663 0 : return;
2664 0 : }
2665 6057 : }
2666 6063 : }
2667 :
2668 : /* max datagram size */
2669 12126 : ulong tx_max_datagram_sz = peer_tp->max_udp_payload_size;
2670 12126 : if( tx_max_datagram_sz < FD_QUIC_INITIAL_PAYLOAD_SZ_MAX ) {
2671 3 : tx_max_datagram_sz = FD_QUIC_INITIAL_PAYLOAD_SZ_MAX;
2672 3 : }
2673 12126 : if( tx_max_datagram_sz > FD_QUIC_INITIAL_PAYLOAD_SZ_MAX ) {
2674 12123 : tx_max_datagram_sz = FD_QUIC_INITIAL_PAYLOAD_SZ_MAX;
2675 12123 : }
2676 12126 : conn->tx_max_datagram_sz = (uint)tx_max_datagram_sz;
2677 :
2678 : /* initial max_streams */
2679 :
2680 12126 : if( conn->server ) {
2681 6063 : conn->tx_sup_stream_id = ( (ulong)peer_tp->initial_max_streams_uni << 2UL ) + FD_QUIC_STREAM_TYPE_UNI_SERVER;
2682 6063 : } else {
2683 6063 : conn->tx_sup_stream_id = ( (ulong)peer_tp->initial_max_streams_uni << 2UL ) + FD_QUIC_STREAM_TYPE_UNI_CLIENT;
2684 6063 : }
2685 :
2686 : /* set the max_idle_timeout to the min of our and peer max_idle_timeout */
2687 12126 : if( peer_tp->max_idle_timeout_ms ) {
2688 12120 : long peer_max_idle_timeout_ns = (long)peer_tp->max_idle_timeout_ms * (long)1e6;
2689 12120 : conn->idle_timeout_ns = fd_long_min( peer_max_idle_timeout_ns, conn->idle_timeout_ns );
2690 12120 : }
2691 :
2692 : /* set ack_delay_exponent so we can properly interpret peer's ack_delays
2693 : if unspecified, the value is 3 */
2694 12126 : ulong peer_ack_delay_exponent = fd_ulong_if(
2695 12126 : peer_tp->ack_delay_exponent_present,
2696 12126 : peer_tp->ack_delay_exponent,
2697 12126 : 3UL );
2698 :
2699 12126 : conn->peer_ack_delay_scale = (float)( 1UL << peer_ack_delay_exponent ) * 1e3f;
2700 :
2701 : /* peer max ack delay in microseconds
2702 : peer_tp->max_ack_delay is milliseconds */
2703 12126 : float peer_max_ack_delay_us = (float)fd_ulong_if(
2704 12126 : peer_tp->max_ack_delay_present,
2705 12126 : peer_tp->max_ack_delay * 1000UL,
2706 12126 : 25000UL );
2707 12126 : conn->peer_max_ack_delay_ns = peer_max_ack_delay_us * 1e3f;
2708 :
2709 12126 : conn->transport_params_set = 1;
2710 12126 : }
2711 :
2712 : void
2713 : fd_quic_tls_cb_peer_params( void * context,
2714 : uchar const * peer_tp_enc,
2715 12123 : ulong peer_tp_enc_sz ) {
2716 12123 : fd_quic_conn_t * conn = (fd_quic_conn_t*)context;
2717 :
2718 : /* decode peer transport parameters */
2719 12123 : fd_quic_transport_params_t peer_tp[1] = {0};
2720 12123 : int rc = fd_quic_decode_transport_params( peer_tp, peer_tp_enc, peer_tp_enc_sz );
2721 12123 : if( FD_UNLIKELY( rc != 0 ) ) {
2722 0 : FD_DEBUG( FD_LOG_NOTICE(( "fd_quic_decode_transport_params failed" )); )
2723 : /* failed to parse transport params */
2724 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_TRANSPORT_PARAMETER_ERROR, __LINE__ );
2725 0 : return;
2726 0 : }
2727 :
2728 12123 : fd_quic_apply_peer_params( conn, peer_tp );
2729 12123 : }
2730 :
2731 : void
2732 : fd_quic_tls_cb_handshake_complete( fd_quic_tls_hs_t * hs,
2733 12120 : void * context ) {
2734 12120 : (void)hs;
2735 12120 : fd_quic_conn_t * conn = (fd_quic_conn_t *)context;
2736 :
2737 : /* need to send quic handshake completion */
2738 12120 : switch( conn->state ) {
2739 0 : case FD_QUIC_CONN_STATE_ABORT:
2740 0 : case FD_QUIC_CONN_STATE_CLOSE_PENDING:
2741 0 : case FD_QUIC_CONN_STATE_DEAD:
2742 : /* ignore */
2743 0 : return;
2744 :
2745 12120 : case FD_QUIC_CONN_STATE_HANDSHAKE:
2746 12120 : if( FD_UNLIKELY( !conn->transport_params_set ) ) { /* unreachable */
2747 0 : FD_LOG_WARNING(( "Handshake marked as completed but transport params are not set. This is a bug!" ));
2748 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_INTERNAL_ERROR, __LINE__ );
2749 0 : return;
2750 0 : }
2751 12120 : conn->handshake_complete = 1;
2752 12120 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_HANDSHAKE_COMPLETE );
2753 12120 : return;
2754 :
2755 0 : default:
2756 0 : FD_LOG_WARNING(( "handshake in unexpected state: %u", conn->state ));
2757 12120 : }
2758 12120 : }
2759 :
2760 : static ulong
2761 : fd_quic_handle_crypto_frame( fd_quic_frame_ctx_t * context,
2762 : fd_quic_crypto_frame_t * crypto,
2763 : uchar const * p,
2764 42429 : ulong p_sz ) {
2765 : /* determine whether any of the data was already provided */
2766 42429 : fd_quic_conn_t * conn = context->conn;
2767 42429 : fd_quic_tls_hs_t * tls_hs = conn->tls_hs;
2768 42429 : uint enc_level = context->pkt->enc_level;
2769 :
2770 : /* offset expected */
2771 42429 : ulong rcv_off = crypto->offset; /* in [0,2^62-1] */
2772 42429 : ulong rcv_sz = crypto->length; /* in [0,2^62-1] */
2773 42429 : ulong rcv_hi = rcv_off + rcv_sz; /* in [0,2^63-1] */
2774 :
2775 42429 : if( FD_UNLIKELY( rcv_sz > p_sz ) ) {
2776 6 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
2777 6 : return FD_QUIC_PARSE_FAIL;
2778 6 : }
2779 :
2780 42423 : if( !tls_hs ) {
2781 : /* Handshake already completed. Ignore frame */
2782 : /* TODO consider aborting conn if too many unsolicited crypto frames arrive */
2783 0 : return rcv_sz;
2784 0 : }
2785 :
2786 42423 : if( enc_level < tls_hs->rx_enc_level ) {
2787 0 : return rcv_sz;
2788 0 : }
2789 :
2790 42423 : if( enc_level > tls_hs->rx_enc_level ) {
2791 : /* Discard data from any previous handshake level. Currently only
2792 : happens at the Initial->Handshake encryption level change. */
2793 12120 : tls_hs->rx_enc_level = (uchar)enc_level;
2794 12120 : tls_hs->rx_off = 0;
2795 12120 : tls_hs->rx_sz = 0;
2796 12120 : }
2797 :
2798 42423 : if( rcv_off > tls_hs->rx_sz ) {
2799 0 : context->pkt->ack_flag |= ACK_FLAG_CANCEL;
2800 0 : return rcv_sz;
2801 0 : }
2802 :
2803 42423 : if( rcv_hi < tls_hs->rx_off ) {
2804 0 : return rcv_sz;
2805 0 : }
2806 :
2807 42423 : if( rcv_hi > FD_QUIC_TLS_RX_DATA_SZ ) {
2808 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_CRYPTO_BUFFER_EXCEEDED, __LINE__ );
2809 0 : return FD_QUIC_PARSE_FAIL;
2810 0 : }
2811 :
2812 42423 : tls_hs->rx_sz = (ushort)rcv_hi;
2813 42423 : fd_memcpy( tls_hs->rx_hs_buf + rcv_off, p, rcv_sz );
2814 :
2815 42423 : int provide_rc = fd_quic_tls_process( conn->tls_hs );
2816 42423 : if( provide_rc == FD_QUIC_FAILED ) {
2817 : /* if TLS fails, ABORT connection */
2818 :
2819 : /* if TLS returns an error, we present that as reason:
2820 : FD_QUIC_CONN_REASON_CRYPTO_BASE + tls-alert
2821 : otherwise, send INTERNAL_ERROR */
2822 3 : uint alert = conn->tls_hs->alert;
2823 3 : uint reason = conn->tls_hs->hs.base.reason;
2824 3 : FD_DTRACE_PROBE_3( quic_handle_crypto_frame, conn->our_conn_id, alert, reason );
2825 3 : if( alert == 0u ) {
2826 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_INTERNAL_ERROR, __LINE__ );
2827 3 : } else {
2828 3 : FD_DEBUG(
2829 3 : FD_LOG_DEBUG(( "QUIC TLS handshake failed (alert %u-%s; reason %u-%s)",
2830 3 : alert, fd_tls_alert_cstr( alert ),
2831 3 : reason, fd_tls_reason_cstr( reason ) ));
2832 3 : )
2833 3 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_CRYPTO_BASE + alert, __LINE__ );
2834 3 : }
2835 3 : return FD_QUIC_PARSE_FAIL;
2836 3 : }
2837 :
2838 42420 : return rcv_sz;
2839 42423 : }
2840 :
2841 : static int
2842 : fd_quic_svc_poll( fd_quic_t * quic,
2843 : fd_quic_conn_t * conn,
2844 13781810 : long now ) {
2845 13781810 : fd_quic_state_t * state = fd_quic_get_state( quic );
2846 13781810 : if( FD_UNLIKELY( conn->state == FD_QUIC_CONN_STATE_INVALID ) ) {
2847 : /* connection shouldn't have been scheduled,
2848 : and is now removed, so just continue */
2849 0 : FD_LOG_CRIT(( "Invalid conn in schedule" ));
2850 0 : return 1;
2851 0 : }
2852 :
2853 13781810 : if( FD_UNLIKELY( now >= conn->last_activity + ( conn->idle_timeout_ns / 2 ) ) ) {
2854 2130 : if( FD_UNLIKELY( now >= conn->last_activity + conn->idle_timeout_ns ) ) {
2855 2112 : if( FD_LIKELY( conn->state != FD_QUIC_CONN_STATE_DEAD ) ) {
2856 : /* rfc9000 10.1 Idle Timeout
2857 : "... the connection is silently closed and its state is discarded
2858 : when it remains idle for longer than the minimum of the
2859 : max_idle_timeout value advertised by both endpoints." */
2860 2112 : FD_DEBUG( FD_LOG_WARNING(("%s conn %p conn_idx: %u closing due to idle timeout=%gms last_activity=%ld now=%ld",
2861 2112 : conn->server?"SERVER":"CLIENT",
2862 2112 : (void *)conn, conn->conn_idx,
2863 2112 : (double)conn->idle_timeout_ns / 1e6,
2864 2112 : conn->last_activity,
2865 2112 : now
2866 2112 : )); )
2867 :
2868 2112 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_DEAD );
2869 2112 : quic->metrics.conn_timeout_cnt++;
2870 2112 : }
2871 2112 : } else if( quic->config.keep_alive & !!(conn->let_die_time_ns > now) ) {
2872 : /* send PING */
2873 12 : if( !( conn->flags & FD_QUIC_CONN_FLAGS_PING ) ) {
2874 12 : conn->flags |= FD_QUIC_CONN_FLAGS_PING;
2875 12 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING; /* update to be sent in next packet */
2876 12 : }
2877 12 : }
2878 2130 : }
2879 :
2880 13781810 : if( FD_UNLIKELY( conn->state == FD_QUIC_CONN_STATE_DEAD ) ) {
2881 2112 : fd_quic_cb_conn_final( quic, conn ); /* inform user before freeing */
2882 2112 : fd_quic_conn_free( quic, conn );
2883 2112 : return 1; /* do NOT reschedule freed connection */
2884 2112 : }
2885 :
2886 : /* state cannot be DEAD here */
2887 13779698 : fd_quic_conn_service( quic, conn, now );
2888 :
2889 : /* dead? don't reinsert, just clean up */
2890 13779698 : switch( conn->state ) {
2891 0 : case FD_QUIC_CONN_STATE_INVALID:
2892 : /* skip entirely */
2893 0 : break;
2894 12102 : case FD_QUIC_CONN_STATE_DEAD:
2895 12102 : fd_quic_cb_conn_final( quic, conn ); /* inform user before freeing */
2896 12102 : fd_quic_conn_free( quic, conn );
2897 12102 : break;
2898 13767596 : default:
2899 : /* prep idle timeout or keep alive at idle timeout/2 */
2900 13767596 : fd_quic_svc_prep_schedule( conn, conn->last_activity + (conn->idle_timeout_ns>>(quic->config.keep_alive)) );
2901 13767596 : fd_quic_svc_timers_schedule( state->svc_timers, conn, state->now );
2902 13767596 : break;
2903 13779698 : }
2904 :
2905 13779698 : return 1;
2906 13779698 : }
2907 :
2908 : int
2909 : fd_quic_service( fd_quic_t * quic,
2910 90320941 : long now ) {
2911 90320941 : fd_quic_state_t * state = fd_quic_get_state( quic );
2912 :
2913 90320941 : state->now = now;
2914 90320941 : long now_ticks = fd_tickcount();
2915 :
2916 90320941 : fd_quic_svc_timers_t * timers = state->svc_timers;
2917 90320941 : svc_cnt_eq_alloc_conn( timers, quic );
2918 90320941 : fd_quic_svc_event_t next = fd_quic_svc_timers_next( timers, now, 1 /* pop */);
2919 90320941 : if( FD_UNLIKELY( next.conn == NULL ) ) {
2920 76539131 : return 0;
2921 76539131 : }
2922 :
2923 13781810 : int cnt = fd_quic_svc_poll( quic, next.conn, now );
2924 :
2925 13781810 : long delta_ticks = fd_tickcount() - now_ticks;
2926 :
2927 13781810 : fd_histf_sample( quic->metrics.service_duration, (ulong)delta_ticks );
2928 :
2929 13781810 : return cnt;
2930 90320941 : }
2931 :
2932 : static inline ulong FD_FN_UNUSED
2933 13802516 : fd_quic_conn_tx_buf_remaining( fd_quic_conn_t * conn ) {
2934 13802516 : return (ulong)( sizeof( conn->tx_buf_conn ) - (ulong)( conn->tx_ptr - conn->tx_buf_conn ) );
2935 13802516 : }
2936 :
2937 : /* attempt to transmit buffered data
2938 :
2939 : prior to call, conn->tx_ptr points to the first free byte in tx_buf
2940 : the data in tx_buf..tx_ptr is prepended by networking headers
2941 : and put on the wire
2942 :
2943 : returns 0 if successful, or 1 otherwise */
2944 : uint
2945 : fd_quic_tx_buffered_raw(
2946 : fd_quic_t * quic,
2947 : uchar ** tx_ptr_ptr,
2948 : uchar * tx_buf,
2949 : ushort * ipv4_id,
2950 : uint dst_ipv4_addr,
2951 : ushort dst_udp_port,
2952 : uint src_ipv4_addr,
2953 : ushort src_udp_port
2954 27558055 : ) {
2955 :
2956 : /* TODO leave space at front of tx_buf for header
2957 : then encode directly into it to avoid 1 copy */
2958 27558055 : uchar *tx_ptr = *tx_ptr_ptr;
2959 27558055 : long payload_sz = tx_ptr - tx_buf;
2960 :
2961 : /* nothing to do */
2962 27558055 : if( FD_UNLIKELY( payload_sz<=0L ) ) {
2963 13761464 : return 0u;
2964 13761464 : }
2965 :
2966 13796591 : fd_quic_config_t * config = &quic->config;
2967 13796591 : fd_quic_state_t * state = fd_quic_get_state( quic );
2968 :
2969 13796591 : uchar * const crypt_scratch = state->crypt_scratch;
2970 :
2971 13796591 : uchar * cur_ptr = state->crypt_scratch;
2972 13796591 : ulong cur_sz = sizeof( state->crypt_scratch );
2973 :
2974 : /* TODO much of this may be prepared ahead of time */
2975 13796591 : fd_quic_pkt_t pkt;
2976 :
2977 13796591 : pkt.ip4->verihl = FD_IP4_VERIHL(4,5);
2978 13796591 : pkt.ip4->tos = (uchar)(config->net.dscp << 2); /* could make this per-connection or per-stream */
2979 13796591 : pkt.ip4->net_tot_len = (ushort)( 20 + 8 + payload_sz );
2980 13796591 : pkt.ip4->net_id = *ipv4_id;
2981 13796591 : pkt.ip4->net_frag_off = 0x4000u; /* don't fragment */
2982 13796591 : pkt.ip4->ttl = 64; /* TODO make configurable */
2983 13796591 : pkt.ip4->protocol = FD_IP4_HDR_PROTOCOL_UDP;
2984 13796591 : pkt.ip4->check = 0;
2985 13796591 : pkt.ip4->saddr = src_ipv4_addr;
2986 13796591 : pkt.ip4->daddr = dst_ipv4_addr;
2987 13796591 : pkt.udp->net_sport = src_udp_port;
2988 13796591 : pkt.udp->net_dport = dst_udp_port;
2989 13796591 : pkt.udp->net_len = (ushort)( 8 + payload_sz );
2990 13796591 : pkt.udp->check = 0x0000;
2991 13796591 : *ipv4_id = (ushort)( *ipv4_id + 1 );
2992 :
2993 13796591 : ulong rc = fd_quic_encode_ip4( cur_ptr, cur_sz, pkt.ip4 );
2994 13796591 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2995 0 : FD_LOG_ERR(( "fd_quic_encode_ip4 failed with buffer overrun" ));
2996 0 : }
2997 :
2998 : /* Compute checksum over network byte order header */
2999 13796591 : fd_ip4_hdr_t * ip4_encoded = (fd_ip4_hdr_t *)fd_type_pun( cur_ptr );
3000 13796591 : ip4_encoded->check = (ushort)fd_ip4_hdr_check_fast( ip4_encoded );
3001 :
3002 13796591 : cur_ptr += rc;
3003 13796591 : cur_sz -= rc;
3004 :
3005 13796591 : rc = fd_quic_encode_udp( cur_ptr, cur_sz, pkt.udp );
3006 13796591 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
3007 0 : FD_LOG_ERR(( "fd_quic_encode_udp failed with buffer overrun" ));
3008 0 : }
3009 :
3010 13796591 : cur_ptr += rc;
3011 13796591 : cur_sz -= rc;
3012 :
3013 : /* need enough space for payload */
3014 13796591 : if( FD_UNLIKELY( (ulong)payload_sz > cur_sz ) ) {
3015 0 : FD_LOG_WARNING(( "%s : payload too big for buffer", __func__ ));
3016 :
3017 : /* reset buffer, since we can't use its contents */
3018 0 : *tx_ptr_ptr = tx_buf;
3019 0 : return FD_QUIC_FAILED;
3020 0 : }
3021 13796591 : fd_memcpy( cur_ptr, tx_buf, (ulong)payload_sz );
3022 :
3023 13796591 : cur_ptr += (ulong)payload_sz;
3024 13796591 : cur_sz -= (ulong)payload_sz;
3025 :
3026 13796591 : fd_aio_pkt_info_t aio_buf = { .buf = crypt_scratch, .buf_sz = (ushort)( cur_ptr - crypt_scratch ) };
3027 13796591 : int aio_rc = fd_aio_send( &quic->aio_tx, &aio_buf, 1, NULL, 1 );
3028 13796591 : if( aio_rc == FD_AIO_ERR_AGAIN ) {
3029 : /* transient condition - try later */
3030 0 : return FD_QUIC_FAILED;
3031 13796591 : } else if( aio_rc != FD_AIO_SUCCESS ) {
3032 0 : FD_LOG_WARNING(( "Fatal error reported by aio peer" ));
3033 : /* fallthrough to reset buffer */
3034 0 : }
3035 :
3036 : /* after send, reset tx_ptr and tx_sz */
3037 13796591 : *tx_ptr_ptr = tx_buf;
3038 :
3039 13796591 : quic->metrics.net_tx_pkt_cnt += aio_rc==FD_AIO_SUCCESS;
3040 13796591 : if( FD_LIKELY( aio_rc==FD_AIO_SUCCESS ) ) {
3041 13796591 : quic->metrics.net_tx_byte_cnt += aio_buf.buf_sz;
3042 13796591 : }
3043 :
3044 13796591 : return FD_QUIC_SUCCESS; /* success */
3045 13796591 : }
3046 :
3047 : uint
3048 : fd_quic_tx_buffered( fd_quic_t * quic,
3049 27557920 : fd_quic_conn_t * conn ) {
3050 27557920 : fd_quic_net_endpoint_t const * endpoint = conn->peer;
3051 27557920 : return fd_quic_tx_buffered_raw(
3052 27557920 : quic,
3053 27557920 : &conn->tx_ptr,
3054 27557920 : conn->tx_buf_conn,
3055 27557920 : &conn->ipv4_id,
3056 27557920 : endpoint->ip_addr,
3057 27557920 : endpoint->udp_port,
3058 27557920 : conn->host.ip_addr,
3059 27557920 : conn->host.udp_port);
3060 27557920 : }
3061 :
3062 : static inline int
3063 : fd_quic_conn_can_acquire_pkt_meta( fd_quic_conn_t * conn,
3064 27157828 : fd_quic_pkt_meta_tracker_t * tracker ) {
3065 27157828 : fd_quic_state_t * state = fd_quic_get_state( conn->quic );
3066 27157828 : fd_quic_metrics_t * metrics = &conn->quic->metrics;
3067 :
3068 27157828 : ulong pool_free = fd_quic_pkt_meta_pool_free( tracker->pool );
3069 27157828 : if( !pool_free || conn->used_pkt_meta >= state->max_inflight_frame_cnt_conn ) {
3070 48 : if( !pool_free ) {
3071 45 : metrics->frame_tx_alloc_cnt[FD_METRICS_ENUM_FRAME_TX_ALLOC_RESULT_V_FAIL_EMPTY_POOL_IDX]++;
3072 45 : } else {
3073 3 : metrics->frame_tx_alloc_cnt[FD_METRICS_ENUM_FRAME_TX_ALLOC_RESULT_V_FAIL_CONN_MAX_IDX]++;
3074 3 : }
3075 48 : return 0;
3076 48 : }
3077 27157780 : metrics->frame_tx_alloc_cnt[FD_METRICS_ENUM_FRAME_TX_ALLOC_RESULT_V_SUCCESS_IDX]++;
3078 :
3079 27157780 : return 1;
3080 27157828 : }
3081 :
3082 : /* fd_quic_gen_frame_store_pkt_meta stores a pkt_meta into tracker.
3083 : Value and type take the passed args; all other fields are copied
3084 : from pkt_meta_tmpl. Returns 1 if successful, 0 if not.
3085 : Failure reasons include empty pkt_meta pool, or this conn reached
3086 : its pkt_meta limit. Theoretically only need latter, but let's be safe! */
3087 : static inline int
3088 : fd_quic_gen_frame_store_pkt_meta( const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3089 : uchar type,
3090 : fd_quic_pkt_meta_value_t value,
3091 : fd_quic_pkt_meta_tracker_t * tracker,
3092 13588040 : fd_quic_conn_t * conn ) {
3093 13588040 : if( !fd_quic_conn_can_acquire_pkt_meta( conn, tracker ) ) return 0;
3094 :
3095 13587995 : conn->used_pkt_meta++;
3096 13587995 : fd_quic_pkt_meta_t * pkt_meta = fd_quic_pkt_meta_pool_ele_acquire( tracker->pool );
3097 13587995 : *pkt_meta = *pkt_meta_tmpl;
3098 13587995 : FD_QUIC_PKT_META_SET_TYPE( pkt_meta, type );
3099 13587995 : pkt_meta->val = value;
3100 13587995 : fd_quic_pkt_meta_insert( &tracker->sent_pkt_metas[pkt_meta->enc_level], pkt_meta, tracker->pool );
3101 13587995 : return 1;
3102 13588040 : }
3103 :
3104 : static ulong
3105 : fd_quic_gen_close_frame( fd_quic_conn_t * conn,
3106 : uchar * payload_ptr,
3107 : uchar * payload_end,
3108 : const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3109 18102 : fd_quic_pkt_meta_tracker_t * tracker ) {
3110 :
3111 18102 : if( conn->flags & FD_QUIC_CONN_FLAGS_CLOSE_SENT ) return 0UL;
3112 12102 : conn->flags |= FD_QUIC_CONN_FLAGS_CLOSE_SENT;
3113 :
3114 12102 : ulong frame_sz;
3115 12102 : if( conn->reason != 0u || conn->state == FD_QUIC_CONN_STATE_PEER_CLOSE ) {
3116 6084 : fd_quic_conn_close_0_frame_t frame = {
3117 6084 : .error_code = conn->reason,
3118 6084 : .frame_type = 0u, /* we do not know the frame in question */
3119 6084 : .reason_phrase_length = 0u /* no reason phrase */
3120 6084 : };
3121 6084 : frame_sz = fd_quic_encode_conn_close_0_frame( payload_ptr,
3122 6084 : (ulong)( payload_end - payload_ptr ),
3123 6084 : &frame );
3124 6084 : } else {
3125 6018 : fd_quic_conn_close_1_frame_t frame = {
3126 6018 : .error_code = conn->app_reason,
3127 6018 : .reason_phrase_length = 0u /* no reason phrase */
3128 6018 : };
3129 6018 : frame_sz = fd_quic_encode_conn_close_1_frame( payload_ptr,
3130 6018 : (ulong)( payload_end - payload_ptr ),
3131 6018 : &frame );
3132 6018 : }
3133 :
3134 12102 : if( FD_UNLIKELY( frame_sz == FD_QUIC_PARSE_FAIL ) ) {
3135 0 : FD_LOG_WARNING(( "fd_quic_encode_conn_close_frame failed, but space should have been available" ));
3136 0 : return 0UL;
3137 0 : }
3138 :
3139 : /* create and save pkt_meta, return 0 if fail */
3140 12102 : if( !fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3141 12102 : FD_QUIC_PKT_META_TYPE_CLOSE,
3142 12102 : (fd_quic_pkt_meta_value_t){0}, /* value doesn't matter */
3143 12102 : tracker,
3144 12102 : conn )) return 0UL;
3145 :
3146 12102 : return frame_sz;
3147 12102 : }
3148 :
3149 : static uchar *
3150 : fd_quic_gen_handshake_frames( fd_quic_conn_t * conn,
3151 : uchar * payload_ptr,
3152 : uchar * payload_end,
3153 : const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3154 13790483 : fd_quic_pkt_meta_tracker_t * tracker ) {
3155 13790483 : uint enc_level = pkt_meta_tmpl->enc_level;
3156 13790483 : fd_quic_tls_hs_data_t * hs_data = fd_quic_tls_get_hs_data( conn->tls_hs, enc_level );
3157 13790483 : if( !hs_data ) return payload_ptr;
3158 :
3159 : /* confirm we have pkt_meta space */
3160 24246 : if( !fd_quic_conn_can_acquire_pkt_meta( conn, tracker ) ) return payload_ptr;
3161 :
3162 24246 : ulong hs_offset = 0; /* offset within the current hs_data */
3163 24246 : ulong sent_offset = conn->hs_sent_bytes[enc_level];
3164 24246 : ulong ackd_offset = conn->hs_ackd_bytes[enc_level];
3165 : /* offset within stream */
3166 24246 : ulong offset = fd_ulong_max( sent_offset, ackd_offset );
3167 :
3168 : /* track pkt_meta values */
3169 24246 : ulong offset_lo = offset;
3170 24246 : ulong offset_hi = offset;
3171 :
3172 109098 : while( hs_data ) {
3173 : /* skip data we've sent */
3174 84852 : if( hs_data->offset + hs_data->data_sz <= offset ) {
3175 42426 : hs_data = fd_quic_tls_get_next_hs_data( conn->tls_hs, hs_data );
3176 42426 : continue;
3177 42426 : }
3178 :
3179 42426 : if( FD_UNLIKELY( hs_data->offset > offset ) ) {
3180 : /* we have a gap - this shouldn't happen */
3181 0 : FD_LOG_WARNING(( "%s - gap in TLS handshake data", __func__ ));
3182 : /* TODO should probably tear down connection */
3183 0 : break;
3184 0 : }
3185 :
3186 : /* encode hs_data into frame */
3187 42426 : hs_offset = offset - hs_data->offset;
3188 :
3189 : /* handshake data to send */
3190 42426 : uchar const * cur_data = hs_data->data + hs_offset;
3191 42426 : ulong cur_data_sz = hs_data->data_sz - hs_offset;
3192 :
3193 : /* 9 bytes header + cur_data_sz */
3194 42426 : if( payload_ptr + 9UL + cur_data_sz > payload_end ) break;
3195 : /* FIXME reduce cur_data_sz if it doesn't fit in frame
3196 : Practically don't need to, because fd_tls generates a small amount of data */
3197 :
3198 42426 : payload_ptr[0] = 0x06; /* CRYPTO frame */
3199 42426 : uint offset_varint = 0x80U | ( fd_uint_bswap( (uint)offset & 0x3fffffffU ) );
3200 42426 : uint length_varint = 0x80U | ( fd_uint_bswap( (uint)cur_data_sz & 0x3fffffffU ) );
3201 42426 : FD_STORE( uint, payload_ptr+1, offset_varint );
3202 42426 : FD_STORE( uint, payload_ptr+5, length_varint );
3203 42426 : payload_ptr += 9;
3204 :
3205 42426 : fd_memcpy( payload_ptr, cur_data, cur_data_sz );
3206 42426 : payload_ptr += cur_data_sz;
3207 :
3208 : /* update pkt_meta values */
3209 42426 : offset_hi += cur_data_sz;
3210 :
3211 : /* move to next hs_data */
3212 42426 : offset += cur_data_sz;
3213 42426 : conn->hs_sent_bytes[enc_level] += cur_data_sz;
3214 :
3215 : /* TODO load more hs_data into a crypto frame, if available
3216 : currently tricky, because encode_crypto_frame copies payload */
3217 42426 : }
3218 :
3219 : /* update packet meta */
3220 24246 : if( offset_hi > offset_lo ) {
3221 24246 : fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3222 24246 : FD_QUIC_PKT_META_TYPE_HS_DATA,
3223 24246 : (fd_quic_pkt_meta_value_t){
3224 24246 : .range = {
3225 24246 : .offset_lo = offset_lo,
3226 24246 : .offset_hi = offset_hi
3227 24246 : }
3228 24246 : },
3229 24246 : tracker,
3230 24246 : conn );
3231 24246 : }
3232 :
3233 24246 : return payload_ptr;
3234 24246 : }
3235 :
3236 : static ulong
3237 : fd_quic_gen_handshake_done_frame( fd_quic_conn_t * conn,
3238 : uchar * payload_ptr,
3239 : uchar * payload_end,
3240 : const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3241 13766237 : fd_quic_pkt_meta_tracker_t * tracker ) {
3242 13766237 : FD_DTRACE_PROBE_1( quic_gen_handshake_done_frame, conn->our_conn_id );
3243 13766237 : if( conn->handshake_done_send==0 ) return 0UL;
3244 6060 : conn->handshake_done_send = 0;
3245 6060 : if( FD_UNLIKELY( conn->handshake_done_ackd ) ) return 0UL;
3246 6060 : if( FD_UNLIKELY( payload_ptr >= payload_end ) ) return 0UL;
3247 : /* send handshake done frame */
3248 6060 : payload_ptr[0] = 0x1E;
3249 :
3250 : /* record the send for retx */
3251 6060 : if( !fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3252 6060 : FD_QUIC_PKT_META_TYPE_HS_DONE,
3253 6060 : (fd_quic_pkt_meta_value_t){0}, /* value doesn't matter */
3254 6060 : tracker,
3255 6060 : conn) ) return 0UL;
3256 :
3257 6060 : return 1UL;
3258 6060 : }
3259 :
3260 : static ulong
3261 : fd_quic_gen_max_data_frame( fd_quic_conn_t * conn,
3262 : uchar * payload_ptr,
3263 : uchar * payload_end,
3264 : const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3265 12264 : fd_quic_pkt_meta_tracker_t * tracker ) {
3266 12264 : fd_quic_conn_stream_rx_t * srx = conn->srx;
3267 :
3268 12264 : if( !( conn->flags & FD_QUIC_CONN_FLAGS_MAX_DATA ) ) return 0UL;
3269 0 : if( srx->rx_max_data <= srx->rx_max_data_ackd ) return 0UL; /* peer would ignore anyway */
3270 :
3271 : /* send max_data frame */
3272 0 : fd_quic_max_data_frame_t frame = { .max_data = srx->rx_max_data };
3273 :
3274 : /* attempt to write into buffer */
3275 0 : ulong frame_sz = fd_quic_encode_max_data_frame( payload_ptr,
3276 0 : (ulong)( payload_end - payload_ptr ),
3277 0 : &frame );
3278 0 : if( FD_UNLIKELY( frame_sz==FD_QUIC_ENCODE_FAIL ) ) return 0UL;
3279 :
3280 : /* acquire and set a pkt_meta, return 0 if not successful */
3281 0 : if( !fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3282 0 : FD_QUIC_PKT_META_TYPE_MAX_DATA,
3283 0 : (fd_quic_pkt_meta_value_t){
3284 0 : .scalar = srx->rx_max_data
3285 0 : },
3286 0 : tracker,
3287 0 : conn ) ) return 0UL;
3288 :
3289 0 : conn->upd_pkt_number = pkt_meta_tmpl->key.pkt_num;
3290 0 : return frame_sz;
3291 0 : }
3292 :
3293 : static ulong
3294 : fd_quic_gen_max_streams_frame( fd_quic_conn_t * conn,
3295 : uchar * payload_ptr,
3296 : uchar * payload_end,
3297 : const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3298 12264 : fd_quic_pkt_meta_tracker_t * tracker ) {
3299 12264 : fd_quic_conn_stream_rx_t * srx = conn->srx;
3300 :
3301 : /* 0x02 Client-Initiated, Unidirectional
3302 : 0x03 Server-Initiated, Unidirectional */
3303 12264 : ulong max_streams_unidir = srx->rx_sup_stream_id >> 2;
3304 :
3305 12264 : uint flags = conn->flags;
3306 12264 : if( !FD_QUIC_MAX_STREAMS_ALWAYS_UNLESS_ACKED ) {
3307 12264 : if( !( flags & FD_QUIC_CONN_FLAGS_MAX_STREAMS_UNIDIR ) ) return 0UL;
3308 0 : if( max_streams_unidir <= srx->rx_max_streams_unidir_ackd ) return 0UL;
3309 0 : }
3310 :
3311 0 : fd_quic_max_streams_frame_t max_streams = {
3312 0 : .type = 0x13, /* unidirectional */
3313 0 : .max_streams = max_streams_unidir
3314 0 : };
3315 0 : ulong frame_sz = fd_quic_encode_max_streams_frame( payload_ptr,
3316 0 : (ulong)( payload_end - payload_ptr ),
3317 0 : &max_streams );
3318 0 : if( FD_UNLIKELY( frame_sz==FD_QUIC_ENCODE_FAIL ) ) return 0UL;
3319 :
3320 0 : if( !fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3321 0 : FD_QUIC_PKT_META_TYPE_MAX_STREAMS_UNIDIR,
3322 0 : (fd_quic_pkt_meta_value_t){0}, /* value doesn't matter */
3323 0 : tracker,
3324 0 : conn ) ) return 0UL;
3325 :
3326 0 : conn->flags = flags & (~FD_QUIC_CONN_FLAGS_MAX_STREAMS_UNIDIR);
3327 0 : conn->upd_pkt_number = pkt_meta_tmpl->key.pkt_num;
3328 0 : return frame_sz;
3329 0 : }
3330 :
3331 : static ulong
3332 : fd_quic_gen_ping_frame( fd_quic_conn_t * conn,
3333 : uchar * payload_ptr,
3334 : uchar * payload_end,
3335 : const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3336 12264 : fd_quic_pkt_meta_tracker_t * tracker ) {
3337 :
3338 12264 : if( ~conn->flags & FD_QUIC_CONN_FLAGS_PING ) return 0UL;
3339 93 : if( conn->flags & FD_QUIC_CONN_FLAGS_PING_SENT ) return 0UL;
3340 :
3341 93 : fd_quic_ping_frame_t ping = {0};
3342 93 : ulong frame_sz = fd_quic_encode_ping_frame( payload_ptr,
3343 93 : (ulong)( payload_end - payload_ptr ),
3344 93 : &ping );
3345 93 : if( FD_UNLIKELY( frame_sz==FD_QUIC_ENCODE_FAIL ) ) return 0UL;
3346 93 : conn->flags |= FD_QUIC_CONN_FLAGS_PING_SENT;
3347 93 : conn->flags &= ~FD_QUIC_CONN_FLAGS_PING;
3348 :
3349 93 : conn->upd_pkt_number = pkt_meta_tmpl->key.pkt_num;
3350 : /* record the send for retx, 0 if fail */
3351 93 : if( !fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3352 93 : FD_QUIC_PKT_META_TYPE_PING,
3353 93 : (fd_quic_pkt_meta_value_t){0}, /* value doesn't matter */
3354 93 : tracker,
3355 93 : conn ) ) return 0UL;
3356 :
3357 48 : return frame_sz;
3358 93 : }
3359 :
3360 : uchar *
3361 : fd_quic_gen_stream_frames( fd_quic_conn_t * conn,
3362 : uchar * payload_ptr,
3363 : uchar * payload_end,
3364 : fd_quic_pkt_meta_t * pkt_meta_tmpl,
3365 13760186 : fd_quic_pkt_meta_tracker_t * tracker ) {
3366 :
3367 : /* loop serves two purposes:
3368 : 1. finds a stream with data to send
3369 : 2. appends max_stream_data frames as necessary */
3370 13760186 : fd_quic_stream_t * sentinel = conn->send_streams;
3371 13760186 : fd_quic_stream_t * cur_stream = sentinel->next;
3372 13760186 : ulong pkt_num = pkt_meta_tmpl->key.pkt_num;
3373 27305728 : while( !cur_stream->sentinel ) {
3374 : /* required, since cur_stream may get removed from list */
3375 13545569 : fd_quic_stream_t * nxt_stream = cur_stream->next;
3376 13545569 : _Bool sent_all_data = 1u;
3377 :
3378 13545569 : if( cur_stream->upd_pkt_number >= pkt_num ) {
3379 :
3380 : /* any stream data? */
3381 13545569 : if( FD_LIKELY( FD_QUIC_STREAM_ACTION( cur_stream ) ) ) {
3382 :
3383 : /* data_avail is the number of stream bytes available for sending.
3384 : fin_flag_set is 1 if no more bytes will get added to the stream. */
3385 13545566 : ulong const data_avail = cur_stream->tx_buf.head - cur_stream->tx_sent;
3386 13545566 : int const fin_flag_set = !!(cur_stream->state & FD_QUIC_STREAM_STATE_TX_FIN);
3387 13545566 : ulong const stream_id = cur_stream->stream_id;
3388 13545566 : ulong const stream_off = cur_stream->tx_sent;
3389 :
3390 : /* No information to send? */
3391 13545566 : if( data_avail==0u && !fin_flag_set ) break;
3392 :
3393 : /* No space to write frame?
3394 : (Buffer should fit max stream header size and at least 1 byte of data) */
3395 13545542 : if( payload_ptr+FD_QUIC_MAX_FOOTPRINT( stream_e_frame )+1 > payload_end ) break;
3396 :
3397 : /* check pkt_meta availability */
3398 13545542 : if( !fd_quic_conn_can_acquire_pkt_meta( conn, tracker ) ) break;
3399 :
3400 : /* Leave placeholder for frame/stream type */
3401 13545539 : uchar * const frame_type_p = payload_ptr++;
3402 13545539 : uint frame_type = 0x0a; /* stream frame with length */
3403 :
3404 : /* Encode stream ID */
3405 13545539 : payload_ptr += fd_quic_varint_encode( payload_ptr, stream_id );
3406 :
3407 : /* Optionally encode offset */
3408 13545539 : if( stream_off>0 ) {
3409 16866 : frame_type |= 0x04; /* with offset field */
3410 16866 : payload_ptr += fd_quic_varint_encode( payload_ptr, stream_off );
3411 16866 : }
3412 :
3413 : /* Leave placeholder for length length */
3414 13545539 : uchar * data_sz_p = payload_ptr;
3415 13545539 : payload_ptr += 2;
3416 :
3417 : /* Stream metadata */
3418 13545539 : ulong data_max = (ulong)payload_end - (ulong)payload_ptr; /* assume no underflow */
3419 13545539 : ulong data_sz = fd_ulong_min( data_avail, data_max );
3420 13545539 : /* */ data_sz = fd_ulong_min( data_sz, 0x3fffUL ); /* max 2 byte varint */
3421 13545539 : /* */ sent_all_data = data_sz == data_avail;
3422 13545539 : _Bool fin = fin_flag_set && sent_all_data;
3423 :
3424 : /* Finish encoding stream header */
3425 13545539 : ushort data_sz_varint = fd_ushort_bswap( (ushort)( 0x4000u | (uint)data_sz ) );
3426 13545539 : FD_STORE( ushort, data_sz_p, data_sz_varint );
3427 13545539 : frame_type |= fin;
3428 13545539 : *frame_type_p = (uchar)frame_type;
3429 :
3430 : /* Write stream payload */
3431 13545539 : fd_quic_buffer_t * tx_buf = &cur_stream->tx_buf;
3432 13545539 : fd_quic_buffer_load( tx_buf, stream_off, payload_ptr, data_sz );
3433 13545539 : payload_ptr += data_sz;
3434 :
3435 : /* Update stream metadata */
3436 13545539 : cur_stream->tx_sent += data_sz;
3437 13545539 : cur_stream->upd_pkt_number = fd_ulong_if( fin, pkt_num, FD_QUIC_PKT_NUM_PENDING );
3438 13545539 : cur_stream->stream_flags &= fd_uint_if( fin, ~FD_QUIC_STREAM_FLAGS_ACTION, UINT_MAX );
3439 :
3440 : /* Packet metadata for potential retransmits */
3441 13545539 : pkt_meta_tmpl->key.stream_id = cur_stream->stream_id;
3442 13545539 : fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3443 13545539 : FD_QUIC_PKT_META_TYPE_STREAM,
3444 13545539 : (fd_quic_pkt_meta_value_t){
3445 13545539 : .range = {
3446 13545539 : .offset_lo = stream_off,
3447 13545539 : .offset_hi = stream_off + data_sz
3448 13545539 : }
3449 13545539 : },
3450 13545539 : tracker,
3451 13545539 : conn );
3452 13545539 : }
3453 13545569 : }
3454 :
3455 13545542 : if( sent_all_data ) {
3456 13528754 : cur_stream->stream_flags &= ~FD_QUIC_STREAM_FLAGS_ACTION;
3457 13528754 : FD_QUIC_STREAM_LIST_REMOVE( cur_stream );
3458 13528754 : FD_QUIC_STREAM_LIST_INSERT_BEFORE( conn->used_streams, cur_stream );
3459 13528754 : }
3460 :
3461 13545542 : cur_stream = nxt_stream;
3462 13545542 : }
3463 :
3464 13760186 : return payload_ptr;
3465 13760186 : }
3466 :
3467 : uchar *
3468 : fd_quic_gen_frames( fd_quic_conn_t * conn,
3469 : uchar * payload_ptr,
3470 : uchar * payload_end,
3471 : fd_quic_pkt_meta_t * pkt_meta_tmpl,
3472 13808585 : long now ) {
3473 :
3474 13808585 : uint closing = 0U;
3475 13808585 : switch( conn->state ) {
3476 12000 : case FD_QUIC_CONN_STATE_PEER_CLOSE:
3477 12084 : case FD_QUIC_CONN_STATE_ABORT:
3478 18102 : case FD_QUIC_CONN_STATE_CLOSE_PENDING:
3479 18102 : closing = 1u;
3480 13808585 : }
3481 :
3482 13808585 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
3483 :
3484 13808585 : payload_ptr = fd_quic_gen_ack_frames( conn->ack_gen, payload_ptr, payload_end, pkt_meta_tmpl->enc_level, now );
3485 13808585 : if( conn->ack_gen->head == conn->ack_gen->tail ) conn->unacked_sz = 0UL;
3486 :
3487 13808585 : if( FD_UNLIKELY( closing ) ) {
3488 18102 : payload_ptr += fd_quic_gen_close_frame( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3489 13790483 : } else {
3490 13790483 : payload_ptr = fd_quic_gen_handshake_frames( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3491 13790483 : if( pkt_meta_tmpl->enc_level == fd_quic_enc_level_appdata_id ) {
3492 13766237 : payload_ptr += fd_quic_gen_handshake_done_frame( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3493 13766237 : if( conn->upd_pkt_number >= pkt_meta_tmpl->key.pkt_num ) {
3494 12264 : payload_ptr += fd_quic_gen_max_data_frame ( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3495 12264 : payload_ptr += fd_quic_gen_max_streams_frame( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3496 12264 : payload_ptr += fd_quic_gen_ping_frame ( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3497 12264 : }
3498 13766237 : if( FD_LIKELY( !conn->tls_hs ) ) {
3499 13760177 : payload_ptr = fd_quic_gen_stream_frames( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3500 13760177 : }
3501 13766237 : }
3502 13790483 : }
3503 :
3504 13808585 : fd_quic_svc_prep_schedule( conn, pkt_meta_tmpl->expiry );
3505 :
3506 13808585 : return payload_ptr;
3507 13808585 : }
3508 :
3509 : /* transmit
3510 : looks at each of the following dependent on state, and creates
3511 : a packet to transmit:
3512 : acks
3513 : handshake data (tls)
3514 : handshake done
3515 : ping
3516 : stream data */
3517 : static void
3518 : fd_quic_conn_tx( fd_quic_t * quic,
3519 13779737 : fd_quic_conn_t * conn ) {
3520 :
3521 13779737 : if( FD_UNLIKELY( conn->state == FD_QUIC_CONN_STATE_DEAD ) ) return;
3522 :
3523 13779737 : fd_quic_state_t * state = fd_quic_get_state( quic );
3524 :
3525 : /* used for encoding frames into before encrypting */
3526 13779737 : uchar * crypt_scratch = state->crypt_scratch;
3527 13779737 : ulong crypt_scratch_sz = sizeof( state->crypt_scratch );
3528 :
3529 : /* max packet size */
3530 : /* TODO probably should be called tx_max_udp_payload_sz */
3531 13779737 : ulong tx_max_datagram_sz = conn->tx_max_datagram_sz;
3532 :
3533 13779737 : if( conn->tx_ptr != conn->tx_buf_conn ) {
3534 0 : fd_quic_tx_buffered( quic, conn );
3535 0 : fd_quic_svc_prep_schedule( conn, state->now );
3536 0 : return;
3537 0 : }
3538 :
3539 : /* choose enc_level to tx at */
3540 : /* this function accepts an argument "acks"
3541 : * We want to minimize the number of packets that carry only acks.
3542 : * fd_quic_tx_enc_level determines whether a packet needs sending,
3543 : * and when encryption level should be used.
3544 : * If "acks" is set to 1 (true), fd_quic_tx_enc_level checks for acks.
3545 : * Otherwise, it does not check for acks
3546 : * We set "acks" only on the first call in this function. All subsequent
3547 : * calls do not set it.
3548 : * This ensures that ack-only packets only occur when nothing else needs
3549 : * to be sent */
3550 13779737 : uint enc_level = fd_quic_tx_enc_level( conn, 1 /* acks */ );
3551 : /* RFC 9000 Section 17.2.2.1. Abandoning Initial Packets
3552 : > A client stops both sending and processing Initial packets when
3553 : > it sends its first Handshake packet. */
3554 13779737 : if( quic->config.role==FD_QUIC_ROLE_CLIENT && enc_level==fd_quic_enc_level_handshake_id ) {
3555 6060 : fd_quic_abandon_enc_level( conn, fd_quic_enc_level_initial_id );
3556 6060 : }
3557 :
3558 : /* nothing to send / bad state? */
3559 13779737 : if( enc_level == ~0u ) return;
3560 :
3561 13779734 : int key_phase_upd = (int)conn->key_update;
3562 13779734 : uint key_phase = conn->key_phase;
3563 13779734 : int key_phase_tx = (int)key_phase ^ key_phase_upd;
3564 :
3565 : /* get time */
3566 13779734 : long now = state->now;
3567 :
3568 : /* initialize expiry and tx_time */
3569 13779734 : fd_quic_pkt_meta_t pkt_meta_tmpl[1] = {{.expiry = now+500000000L, .tx_time = now}};
3570 : // pkt_meta_tmpl->expiry = fd_quic_calc_expiry( conn, now );
3571 : //ulong margin = (ulong)(conn->rtt->smoothed_rtt) + (ulong)(3 * conn->rtt->var_rtt);
3572 : //if( margin < pkt_meta->expiry ) {
3573 : // pkt_meta->expiry -= margin;
3574 : //}
3575 :
3576 27582250 : while( enc_level != ~0u ) {
3577 13808585 : uint initial_pkt = 0; /* is this the first initial packet? */
3578 :
3579 :
3580 : /* remaining in datagram */
3581 : /* invariant: tx_ptr >= tx_buf */
3582 13808585 : ulong datagram_rem = tx_max_datagram_sz - (ulong)( conn->tx_ptr - conn->tx_buf_conn );
3583 :
3584 : /* encode into here */
3585 : /* this is the start of a new quic packet
3586 : cur_ptr points at the next byte to fill with a quic pkt */
3587 : /* currently, cur_ptr just points at the start of crypt_scratch
3588 : each quic packet gets encrypted into tx_buf, and the space in
3589 : crypt_scratch is reused */
3590 13808585 : uchar * cur_ptr = crypt_scratch;
3591 13808585 : ulong cur_sz = crypt_scratch_sz;
3592 :
3593 : /* TODO determine actual datagrams size to use */
3594 13808585 : cur_sz = fd_ulong_min( cur_sz, datagram_rem );
3595 :
3596 : /* determine pn_space */
3597 13808585 : uint pn_space = fd_quic_enc_level_to_pn_space( enc_level );
3598 13808585 : pkt_meta_tmpl->pn_space = (uchar)pn_space;
3599 13808585 : pkt_meta_tmpl->enc_level = (uchar)(enc_level&0x3);
3600 :
3601 : /* get next packet number
3602 : Returned to pool if not sent as gaps are harmful for ACK frame
3603 : compression. */
3604 13808585 : ulong pkt_number = conn->pkt_number[pn_space];
3605 13808585 : FD_QUIC_PKT_META_SET_PKT_NUM( pkt_meta_tmpl, pkt_number );
3606 :
3607 : /* are we the client initial packet? */
3608 13808585 : ulong hs_data_offset = conn->hs_sent_bytes[enc_level];
3609 13808585 : initial_pkt = (uint)( hs_data_offset == 0 ) & (uint)( !conn->server ) & (uint)( enc_level == fd_quic_enc_level_initial_id );
3610 :
3611 : /* current peer endpoint */
3612 13808585 : fd_quic_conn_id_t const * peer_conn_id = &conn->peer_cids[0];
3613 :
3614 : /* our current conn_id */
3615 13808585 : ulong conn_id = conn->our_conn_id;
3616 13808585 : uint const pkt_num_len = 4u; /* 4-byte packet number */
3617 13808585 : uint const pkt_num_len_enc = pkt_num_len - 1; /* -1 offset for protocol */
3618 :
3619 :
3620 : /* encode packet header (including packet number)
3621 : While encoding, remember where the 'length' field is, if one
3622 : exists. We'll have to update it later. */
3623 13808585 : uchar * hdr_ptr = cur_ptr;
3624 13808585 : ulong hdr_sz = 0UL;
3625 13808585 : uchar _hdr_len_field[2]; /* if no len field exists, catch the write here */
3626 13808585 : uchar * hdr_len_field = _hdr_len_field;
3627 13808585 : switch( enc_level ) {
3628 12210 : case fd_quic_enc_level_initial_id: {
3629 12210 : fd_quic_initial_t initial = {0};
3630 12210 : initial.h0 = fd_quic_initial_h0( pkt_num_len_enc );
3631 12210 : initial.version = 1;
3632 12210 : initial.dst_conn_id_len = peer_conn_id->sz;
3633 : // .dst_conn_id
3634 12210 : initial.src_conn_id_len = FD_QUIC_CONN_ID_SZ;
3635 : // .src_conn_id
3636 : // .token - below
3637 12210 : initial.len = 0x3fff; /* use 2 byte varint encoding */
3638 12210 : initial.pkt_num = pkt_number;
3639 :
3640 12210 : fd_memcpy( initial.dst_conn_id, peer_conn_id->conn_id, peer_conn_id->sz );
3641 12210 : memcpy( initial.src_conn_id, &conn_id, FD_QUIC_CONN_ID_SZ );
3642 :
3643 : /* Initial packets sent by the server MUST set the Token Length field to 0. */
3644 12210 : initial.token = conn->token;
3645 12210 : if( conn->quic->config.role == FD_QUIC_ROLE_CLIENT && conn->token_len ) {
3646 9 : initial.token_len = conn->token_len;
3647 12201 : } else {
3648 12201 : initial.token_len = 0;
3649 12201 : }
3650 :
3651 12210 : hdr_sz = fd_quic_encode_initial( cur_ptr, cur_sz, &initial );
3652 12210 : hdr_len_field = cur_ptr + hdr_sz - 6; /* 2 byte len, 4 byte packet number */
3653 12210 : FD_DTRACE_PROBE_2( quic_encode_initial, initial.src_conn_id, initial.dst_conn_id );
3654 12210 : break;
3655 0 : }
3656 :
3657 12120 : case fd_quic_enc_level_handshake_id: {
3658 12120 : fd_quic_handshake_t handshake = {0};
3659 12120 : handshake.h0 = fd_quic_handshake_h0( pkt_num_len_enc );
3660 12120 : handshake.version = 1;
3661 :
3662 : /* destination */
3663 12120 : fd_memcpy( handshake.dst_conn_id, peer_conn_id->conn_id, peer_conn_id->sz );
3664 12120 : handshake.dst_conn_id_len = peer_conn_id->sz;
3665 :
3666 : /* source */
3667 12120 : FD_STORE( ulong, handshake.src_conn_id, conn_id );
3668 12120 : handshake.src_conn_id_len = sizeof(ulong);
3669 :
3670 12120 : handshake.len = 0x3fff; /* use 2 byte varint encoding */
3671 12120 : handshake.pkt_num = pkt_number;
3672 :
3673 12120 : hdr_sz = fd_quic_encode_handshake( cur_ptr, cur_sz, &handshake );
3674 12120 : hdr_len_field = cur_ptr + hdr_sz - 6; /* 2 byte len, 4 byte packet number */
3675 12120 : FD_DTRACE_PROBE_2( quic_encode_handshake, handshake.src_conn_id, handshake.dst_conn_id );
3676 12120 : break;
3677 0 : }
3678 :
3679 13784255 : case fd_quic_enc_level_appdata_id:
3680 13784255 : {
3681 13784255 : fd_quic_one_rtt_t one_rtt = {0};
3682 13784255 : one_rtt.h0 = fd_quic_one_rtt_h0( /* spin */ 0, !!key_phase_tx, pkt_num_len_enc );
3683 :
3684 : /* destination */
3685 13784255 : fd_memcpy( one_rtt.dst_conn_id, peer_conn_id->conn_id, peer_conn_id->sz );
3686 13784255 : one_rtt.dst_conn_id_len = peer_conn_id->sz;
3687 :
3688 13784255 : one_rtt.pkt_num = pkt_number;
3689 :
3690 13784255 : hdr_sz = fd_quic_encode_one_rtt( cur_ptr, cur_sz, &one_rtt );
3691 13784255 : FD_DTRACE_PROBE_2( quic_encode_one_rtt, one_rtt.dst_conn_id, one_rtt.pkt_num );
3692 13784255 : break;
3693 0 : }
3694 :
3695 0 : default:
3696 0 : FD_LOG_ERR(( "%s - logic error: unexpected enc_level", __func__ ));
3697 13808585 : }
3698 :
3699 : /* if we don't have reasonable amt of space for a new packet, tx to free space */
3700 13808585 : const ulong min_rqd = 64;
3701 13808585 : if( FD_UNLIKELY( hdr_sz==FD_QUIC_ENCODE_FAIL || hdr_sz + min_rqd > cur_sz ) ) {
3702 : /* try to free space */
3703 0 : fd_quic_tx_buffered( quic, conn );
3704 :
3705 : /* we have lots of space, so try again */
3706 0 : if( conn->tx_buf_conn == conn->tx_ptr ) {
3707 0 : enc_level = fd_quic_tx_enc_level( conn, 0 /* acks */ );
3708 0 : continue;
3709 0 : }
3710 :
3711 : /* reschedule, since some data was unable to be sent */
3712 : /* TODO might want to add a backoff here */
3713 0 : fd_quic_svc_prep_schedule( conn, now );
3714 :
3715 0 : break;
3716 0 : }
3717 :
3718 13808585 : cur_ptr += hdr_sz;
3719 13808585 : cur_sz -= hdr_sz;
3720 :
3721 : /* start writing payload, leaving room for header and expansion
3722 : due to varint coding */
3723 :
3724 13808585 : uchar * payload_ptr = cur_ptr;
3725 13808585 : ulong payload_sz = cur_sz;
3726 : /* payload_end leaves room for TAG */
3727 13808585 : uchar * payload_end = payload_ptr + payload_sz - FD_QUIC_CRYPTO_TAG_SZ;
3728 :
3729 13808585 : uchar * const frame_start = payload_ptr;
3730 13808585 : payload_ptr = fd_quic_gen_frames( conn, frame_start, payload_end, pkt_meta_tmpl, now );
3731 13808585 : if( FD_UNLIKELY( payload_ptr < frame_start ) ) FD_LOG_CRIT(( "fd_quic_gen_frames failed" ));
3732 :
3733 : /* did we add any frames? */
3734 :
3735 13808585 : if( payload_ptr==frame_start ) {
3736 : /* we have data to add, but none was added, presumably due
3737 : so space in the datagram */
3738 6069 : ulong free_bytes = (ulong)( payload_ptr - payload_end );
3739 : /* sanity check */
3740 6069 : if( free_bytes > 64 ) {
3741 : /* we should have been able to fit data into 64 bytes
3742 : so stop trying here */
3743 6069 : break;
3744 6069 : }
3745 :
3746 : /* try to free space */
3747 0 : fd_quic_tx_buffered( quic, conn );
3748 :
3749 : /* we have lots of space, so try again */
3750 0 : if( conn->tx_buf_conn == conn->tx_ptr ) {
3751 0 : enc_level = fd_quic_tx_enc_level( conn, 0 /* acks */ );
3752 0 : continue;
3753 0 : }
3754 0 : }
3755 :
3756 : /* first initial frame is padded to FD_QUIC_INITIAL_PAYLOAD_SZ_MIN
3757 : all short quic packets are padded so 16 bytes of sample are available */
3758 13802516 : uint tot_frame_sz = (uint)( payload_ptr - frame_start );
3759 13802516 : uint base_pkt_len = (uint)tot_frame_sz + pkt_num_len + FD_QUIC_CRYPTO_TAG_SZ;
3760 13802516 : uint padding = initial_pkt ? FD_QUIC_INITIAL_PAYLOAD_SZ_MIN - base_pkt_len : 0u;
3761 :
3762 13802516 : if( base_pkt_len + padding < FD_QUIC_CRYPTO_SAMPLE_OFFSET_FROM_PKT_NUM_START + FD_QUIC_CRYPTO_SAMPLE_SZ ) {
3763 0 : padding = FD_QUIC_CRYPTO_SAMPLE_SZ + FD_QUIC_CRYPTO_SAMPLE_OFFSET_FROM_PKT_NUM_START - base_pkt_len;
3764 0 : }
3765 :
3766 : /* this length includes the packet number length (pkt_number_len_enc+1),
3767 : padding and the final TAG */
3768 13802516 : uint quic_pkt_len = base_pkt_len + padding;
3769 :
3770 : /* set the length on the packet header */
3771 13802516 : uint quic_pkt_len_varint = 0x4000u | fd_uint_min( quic_pkt_len, 0x3fff );
3772 13802516 : FD_STORE( ushort, hdr_len_field, fd_ushort_bswap( (ushort)quic_pkt_len_varint ) );
3773 :
3774 : /* add padding */
3775 13802516 : if( padding ) {
3776 6066 : fd_memset( payload_ptr, 0, padding );
3777 6066 : payload_ptr += padding;
3778 6066 : }
3779 :
3780 : /* everything successful up to here
3781 : encrypt into tx_ptr,tx_ptr+tx_sz */
3782 :
3783 : #if FD_QUIC_DISABLE_CRYPTO
3784 : ulong quic_pkt_sz = hdr_sz + tot_frame_sz + padding;
3785 : fd_memcpy( conn->tx_ptr, hdr_ptr, quic_pkt_sz );
3786 : conn->tx_ptr += quic_pkt_sz;
3787 :
3788 : /* append MAC tag */
3789 : memset( conn->tx_ptr, 0, FD_QUIC_CRYPTO_TAG_SZ );
3790 : conn->tx_ptr += FD_QUIC_CRYPTO_TAG_SZ;
3791 : #else
3792 13802516 : ulong cipher_text_sz = fd_quic_conn_tx_buf_remaining( conn );
3793 13802516 : ulong frames_sz = (ulong)( payload_ptr - frame_start ); /* including padding */
3794 :
3795 13802516 : fd_quic_crypto_keys_t * hp_keys = &conn->keys[enc_level][1];
3796 13802516 : fd_quic_crypto_keys_t * pkt_keys = key_phase_upd ? &conn->new_keys[1] : &conn->keys[enc_level][1];
3797 :
3798 13802516 : if( FD_UNLIKELY( fd_quic_crypto_encrypt( conn->tx_ptr, &cipher_text_sz, hdr_ptr, hdr_sz,
3799 13802516 : frame_start, frames_sz, pkt_keys, hp_keys, pkt_number ) != FD_QUIC_SUCCESS ) ) {
3800 0 : FD_LOG_WARNING(( "fd_quic_crypto_encrypt failed" ));
3801 :
3802 : /* this situation is unlikely to improve, so kill the connection */
3803 0 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_DEAD );
3804 0 : fd_quic_svc_prep_schedule_now( conn );
3805 0 : quic->metrics.conn_aborted_cnt++;
3806 0 : break;
3807 0 : }
3808 :
3809 13802516 : conn->tx_ptr += cipher_text_sz;
3810 13802516 : #endif
3811 :
3812 : /* we have committed the packet into the buffer, so inc pkt_number */
3813 13802516 : conn->pkt_number[pn_space]++;
3814 :
3815 13802516 : if( enc_level == fd_quic_enc_level_appdata_id ) {
3816 : /* short header must be last in datagram
3817 : so send in packet immediately */
3818 13778186 : fd_quic_tx_buffered( quic, conn );
3819 :
3820 13778186 : if( conn->tx_ptr == conn->tx_buf_conn ) {
3821 13778186 : enc_level = fd_quic_tx_enc_level( conn, 0 /* acks */ );
3822 13778186 : continue;
3823 13778186 : }
3824 :
3825 : /* TODO count here */
3826 :
3827 : /* drop packet */
3828 : /* this is a workaround for leaving a short=header-packet in the buffer
3829 : for the next tx_conn call. Next time around the tx_conn call will
3830 : not be aware that the buffer cannot be added to */
3831 0 : conn->tx_ptr = conn->tx_buf_conn;
3832 :
3833 0 : break;
3834 13778186 : }
3835 :
3836 : /* Refresh enc_level in case we can coalesce another packet */
3837 24330 : enc_level = fd_quic_tx_enc_level( conn, 0 /* acks */ );
3838 24330 : FD_DEBUG( if( enc_level!=~0u) FD_LOG_DEBUG(( "Attempting to append enc_level=%u packet", enc_level )); )
3839 24330 : }
3840 :
3841 : /* try to send? */
3842 13779734 : fd_quic_tx_buffered( quic, conn );
3843 13779734 : }
3844 :
3845 : void
3846 13779737 : fd_quic_conn_service( fd_quic_t * quic, fd_quic_conn_t * conn, long now ) {
3847 :
3848 : /* Send new rtt measurement probe? */
3849 13779737 : if( FD_UNLIKELY( now > conn->last_ack + (long)conn->rtt_period_ns ) ) {
3850 : /* send PING */
3851 12012 : if( !( conn->flags & ( FD_QUIC_CONN_FLAGS_PING | FD_QUIC_CONN_FLAGS_PING_SENT ) )
3852 12012 : && conn->state == FD_QUIC_CONN_STATE_ACTIVE ) {
3853 0 : conn->flags |= FD_QUIC_CONN_FLAGS_PING;
3854 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING; /* update to be sent in next packet */
3855 0 : }
3856 12012 : }
3857 :
3858 : /* handle expiry on pkt_meta */
3859 13779737 : fd_quic_pkt_meta_retry( quic, conn, 0 /* don't force */, ~0u /* enc_level */ );
3860 :
3861 : /* check state
3862 : need reset?
3863 : need close?
3864 : need acks?
3865 : replies?
3866 : data to send?
3867 : dead */
3868 13779737 : switch( conn->state ) {
3869 12126 : case FD_QUIC_CONN_STATE_HANDSHAKE:
3870 24246 : case FD_QUIC_CONN_STATE_HANDSHAKE_COMPLETE:
3871 24246 : {
3872 24246 : if( conn->tls_hs ) {
3873 : /* if we're the server, we send "handshake-done" frame */
3874 24246 : if( conn->state == FD_QUIC_CONN_STATE_HANDSHAKE_COMPLETE && conn->server ) {
3875 6060 : conn->handshake_done_send = 1;
3876 :
3877 : /* move straight to ACTIVE */
3878 6060 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_ACTIVE );
3879 :
3880 : /* RFC 9001 4.9.2. Discarding Handshake Keys
3881 : > An endpoint MUST discard its Handshake keys when the
3882 : > TLS handshake is confirmed
3883 : RFC 9001 4.1.2. Handshake Confirmed
3884 : > [...] the TLS handshake is considered confirmed at the
3885 : > server when the handshake completes */
3886 6060 : fd_quic_abandon_enc_level( conn, fd_quic_enc_level_handshake_id );
3887 :
3888 : /* user callback */
3889 6060 : fd_quic_cb_conn_new( quic, conn );
3890 :
3891 : /* clear out hs_data here, as we don't need it anymore */
3892 6060 : fd_quic_tls_clear_hs_data( conn->tls_hs, fd_quic_enc_level_appdata_id );
3893 6060 : }
3894 :
3895 : /* if we're the client, fd_quic_conn_tx will flush the hs
3896 : buffer so we can receive the HANDSHAKE_DONE frame, and
3897 : transition from CONN_STATE HANDSHAKE_COMPLETE to ACTIVE. */
3898 24246 : }
3899 :
3900 : /* do we have data to transmit? */
3901 24246 : fd_quic_conn_tx( quic, conn );
3902 :
3903 24246 : break;
3904 12126 : }
3905 :
3906 6018 : case FD_QUIC_CONN_STATE_CLOSE_PENDING:
3907 12018 : case FD_QUIC_CONN_STATE_PEER_CLOSE:
3908 : /* user requested close, and may have set a reason code */
3909 : /* transmit the failure reason */
3910 12018 : fd_quic_conn_tx( quic, conn );
3911 :
3912 : /* schedule another fd_quic_conn_service to free the conn */
3913 12018 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_DEAD ); /* TODO need draining state wait for 3 * TPO */
3914 12018 : quic->metrics.conn_closed_cnt++;
3915 :
3916 12018 : break;
3917 :
3918 84 : case FD_QUIC_CONN_STATE_ABORT:
3919 : /* transmit the failure reason */
3920 84 : fd_quic_conn_tx( quic, conn );
3921 :
3922 : /* schedule another fd_quic_conn_service to free the conn */
3923 84 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_DEAD );
3924 84 : quic->metrics.conn_aborted_cnt++;
3925 :
3926 84 : break;
3927 :
3928 13743389 : case FD_QUIC_CONN_STATE_ACTIVE:
3929 : /* do we have data to transmit? */
3930 13743389 : fd_quic_conn_tx( quic, conn );
3931 :
3932 13743389 : break;
3933 :
3934 0 : case FD_QUIC_CONN_STATE_DEAD:
3935 0 : case FD_QUIC_CONN_STATE_INVALID:
3936 : /* fall thru */
3937 0 : default:
3938 0 : FD_LOG_CRIT(( "invalid conn state %u", conn->state ));
3939 0 : return;
3940 13779737 : }
3941 :
3942 : /* check routing and arp for this connection */
3943 :
3944 13779737 : }
3945 :
3946 : void
3947 : fd_quic_conn_free( fd_quic_t * quic,
3948 14331 : fd_quic_conn_t * conn ) {
3949 14331 : if( FD_UNLIKELY( !conn ) ) {
3950 0 : FD_LOG_WARNING(( "NULL conn" ));
3951 0 : return;
3952 0 : }
3953 14331 : if( FD_UNLIKELY( conn->state == FD_QUIC_CONN_STATE_INVALID ) ) {
3954 0 : FD_LOG_CRIT(( "double free detected" ));
3955 0 : return;
3956 0 : }
3957 :
3958 14331 : FD_COMPILER_MFENCE();
3959 14331 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_INVALID );
3960 14331 : FD_COMPILER_MFENCE();
3961 :
3962 14331 : fd_quic_state_t * state = fd_quic_get_state( quic );
3963 :
3964 : /* no need to remove this connection from the events queue
3965 : free is called from two places:
3966 : fini - service will never be called again. All events are destroyed
3967 : service - removes event before calling free. Event only allowed to be
3968 : enqueued once */
3969 :
3970 : /* free pkt_meta */
3971 14331 : fd_quic_conn_free_pkt_meta( conn, fd_quic_enc_level_appdata_id );
3972 :
3973 : /* remove all stream ids from map, and free stream */
3974 :
3975 : /* remove used streams */
3976 14331 : fd_quic_stream_t * used_sentinel = conn->used_streams;
3977 20471 : while( 1 ) {
3978 20471 : fd_quic_stream_t * stream = used_sentinel->next;
3979 :
3980 20471 : if( FD_UNLIKELY( stream == used_sentinel ) ) break;
3981 :
3982 6140 : fd_quic_tx_stream_free( quic, conn, stream, FD_QUIC_STREAM_NOTIFY_CONN );
3983 6140 : }
3984 :
3985 : /* remove send streams */
3986 14331 : fd_quic_stream_t * send_sentinel = conn->send_streams;
3987 20346 : while( 1 ) {
3988 20346 : fd_quic_stream_t * stream = send_sentinel->next;
3989 :
3990 20346 : if( FD_UNLIKELY( stream == send_sentinel ) ) break;
3991 :
3992 6015 : fd_quic_tx_stream_free( quic, conn, stream, FD_QUIC_STREAM_NOTIFY_CONN );
3993 6015 : }
3994 :
3995 : /* if any stream map entries are left over, remove them
3996 : this should not occur, so this branch should not execute
3997 : but if a stream doesn't get cleaned up properly, this fixes
3998 : the stream map */
3999 14331 : if( FD_UNLIKELY( conn->stream_map && fd_quic_stream_map_key_cnt( conn->stream_map ) > 0 ) ) {
4000 0 : FD_LOG_WARNING(( "stream_map not empty. cnt: %lu",
4001 0 : (ulong)fd_quic_stream_map_key_cnt( conn->stream_map ) ));
4002 0 : while( fd_quic_stream_map_key_cnt( conn->stream_map ) > 0 ) {
4003 0 : int removed = 0;
4004 0 : for( ulong j = 0; j < fd_quic_stream_map_slot_cnt( conn->stream_map ); ++j ) {
4005 0 : if( conn->stream_map[j].stream_id != FD_QUIC_STREAM_ID_UNUSED ) {
4006 0 : fd_quic_stream_map_remove( conn->stream_map, &conn->stream_map[j] );
4007 0 : removed = 1;
4008 0 : j--; /* retry this entry */
4009 0 : }
4010 0 : }
4011 0 : if( !removed ) {
4012 0 : FD_LOG_WARNING(( "None removed. Remain: %lu",
4013 0 : (ulong)fd_quic_stream_map_key_cnt( conn->stream_map ) ));
4014 0 : break;
4015 0 : }
4016 0 : }
4017 0 : }
4018 :
4019 14331 : if( conn->tls_hs ) {
4020 : /* free tls-hs */
4021 117 : fd_quic_tls_hs_delete( conn->tls_hs );
4022 :
4023 : /* Remove the handshake from the cache before releasing it */
4024 117 : fd_quic_tls_hs_cache_ele_remove( &state->hs_cache, conn->tls_hs, state->hs_pool);
4025 117 : fd_quic_tls_hs_pool_ele_release( state->hs_pool, conn->tls_hs );
4026 117 : }
4027 14331 : conn->tls_hs = NULL;
4028 :
4029 : /* remove from service queue */
4030 14331 : fd_quic_svc_timers_cancel( state->svc_timers, conn );
4031 :
4032 : /* put connection back in free list */
4033 14331 : conn->free_conn_next = state->free_conn_list;
4034 14331 : state->free_conn_list = conn->conn_idx;
4035 14331 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_INVALID );
4036 :
4037 14331 : quic->metrics.conn_alloc_cnt--;
4038 :
4039 : /* clear keys */
4040 14331 : memset( &conn->secrets, 0, sizeof(fd_quic_crypto_secrets_t) );
4041 14331 : memset( conn->keys, 0, sizeof( conn->keys ) );
4042 14331 : memset( conn->new_keys, 0, sizeof( conn->new_keys ) );
4043 14331 : }
4044 :
4045 : fd_quic_conn_t *
4046 : fd_quic_connect( fd_quic_t * quic,
4047 : uint dst_ip_addr,
4048 : ushort dst_udp_port,
4049 : uint src_ip_addr,
4050 : ushort src_udp_port,
4051 6099 : long now ) {
4052 6099 : fd_quic_state_t * state = fd_quic_get_state( quic );
4053 6099 : state->now = now;
4054 :
4055 6099 : if( FD_UNLIKELY( !fd_quic_tls_hs_pool_free( state->hs_pool ) ) ) {
4056 : /* try evicting, 0 if oldest is too young so fail */
4057 6 : if( !fd_quic_tls_hs_cache_evict( quic, state ) ) {
4058 3 : return NULL;
4059 3 : }
4060 6 : }
4061 :
4062 6096 : fd_rng_t * rng = state->_rng;
4063 :
4064 : /* create conn ids for us and them
4065 : client creates connection id for the peer, peer immediately replaces it */
4066 6096 : ulong our_conn_id_u64 = fd_rng_ulong( rng );
4067 6096 : fd_quic_conn_id_t peer_conn_id; fd_quic_conn_id_rand( &peer_conn_id, rng );
4068 :
4069 6096 : fd_quic_conn_t * conn = fd_quic_conn_create(
4070 6096 : quic,
4071 6096 : our_conn_id_u64,
4072 6096 : &peer_conn_id,
4073 6096 : dst_ip_addr,
4074 6096 : dst_udp_port,
4075 6096 : src_ip_addr,
4076 6096 : src_udp_port,
4077 6096 : 0 /* client */ );
4078 :
4079 6096 : if( FD_UNLIKELY( !conn ) ) {
4080 3 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_conn_create failed" )) );
4081 3 : return NULL;
4082 3 : }
4083 :
4084 : /* Prepare QUIC-TLS transport params object (sent as a TLS extension).
4085 : Take template from state and mutate certain params in-place.
4086 :
4087 : See RFC 9000 Section 18 */
4088 :
4089 6093 : fd_quic_transport_params_t tp[1] = { state->transport_params };
4090 :
4091 : /* The original_destination_connection_id is omitted by clients.
4092 : Since this is a mutable field, explicitly clear it here. */
4093 :
4094 6093 : tp->original_destination_connection_id_present = 0;
4095 6093 : tp->original_destination_connection_id_len = 0;
4096 :
4097 : /* Similarly, explicitly zero out retry fields. */
4098 6093 : tp->retry_source_connection_id_present = 0;
4099 6093 : tp->retry_source_connection_id_len = 0;
4100 :
4101 : /* Repeat source conn ID -- rationale see fd_quic_handle_v1_initial */
4102 :
4103 6093 : FD_STORE( ulong, tp->initial_source_connection_id, conn->initial_source_conn_id );
4104 6093 : tp->initial_source_connection_id_present = 1;
4105 6093 : tp->initial_source_connection_id_len = FD_QUIC_CONN_ID_SZ;
4106 :
4107 : /* Create a TLS handshake (free>0 validated above) */
4108 :
4109 6093 : fd_quic_tls_hs_t * tls_hs = fd_quic_tls_hs_new(
4110 6093 : fd_quic_tls_hs_pool_ele_acquire( state->hs_pool ),
4111 6093 : state->tls,
4112 6093 : (void*)conn,
4113 6093 : 0 /*is_server*/,
4114 6093 : tp,
4115 6093 : now );
4116 6093 : if( FD_UNLIKELY( tls_hs->alert ) ) {
4117 0 : FD_LOG_WARNING(( "fd_quic_tls_hs_client_new failed" ));
4118 : /* shut down tls_hs */
4119 0 : fd_quic_conn_free( quic, conn );
4120 0 : return NULL;
4121 0 : }
4122 6093 : fd_quic_tls_hs_cache_ele_push_tail( &state->hs_cache, tls_hs, state->hs_pool );
4123 :
4124 6093 : quic->metrics.hs_created_cnt++;
4125 6093 : conn->tls_hs = tls_hs;
4126 :
4127 6093 : fd_quic_gen_initial_secret_and_keys( conn, &peer_conn_id, /* is_server */ 0 );
4128 :
4129 : /* set "called_conn_new" to indicate we should call conn_final
4130 : upon teardown */
4131 6093 : conn->called_conn_new = 1;
4132 :
4133 6093 : fd_quic_svc_prep_schedule( conn, now );
4134 6093 : fd_quic_svc_timers_schedule( state->svc_timers, conn, now );
4135 :
4136 : /* everything initialized */
4137 6093 : return conn;
4138 :
4139 6093 : }
4140 :
4141 : fd_quic_conn_t *
4142 : fd_quic_conn_create( fd_quic_t * quic,
4143 : ulong our_conn_id,
4144 : fd_quic_conn_id_t const * peer_conn_id,
4145 : uint peer_ip_addr,
4146 : ushort peer_udp_port,
4147 : uint self_ip_addr,
4148 : ushort self_udp_port,
4149 314388 : int server ) {
4150 314388 : if( FD_UNLIKELY( !our_conn_id ) ) return NULL;
4151 :
4152 314388 : fd_quic_config_t * config = &quic->config;
4153 314388 : fd_quic_state_t * state = fd_quic_get_state( quic );
4154 :
4155 : /* fetch top of connection free list */
4156 314388 : uint conn_idx = state->free_conn_list;
4157 314388 : if( FD_UNLIKELY( conn_idx==UINT_MAX ) ) {
4158 3 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_conn_create failed: no free conn slots" )) );
4159 3 : quic->metrics.conn_err_no_slots_cnt++;
4160 3 : return NULL;
4161 3 : }
4162 314385 : if( FD_UNLIKELY( conn_idx >= quic->limits.conn_cnt ) ) {
4163 0 : FD_LOG_ERR(( "Conn free list corruption detected" ));
4164 0 : return NULL;
4165 0 : }
4166 314385 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, conn_idx );
4167 314385 : if( FD_UNLIKELY( conn->state != FD_QUIC_CONN_STATE_INVALID ) ) {
4168 0 : FD_LOG_ERR(( "conn %p not free, this is a bug", (void *)conn ));
4169 0 : return NULL;
4170 0 : }
4171 :
4172 : /* prune previous conn map entry */
4173 314385 : fd_quic_conn_map_t * entry = fd_quic_conn_query1( state->conn_map, conn->our_conn_id, NULL );
4174 314385 : if( entry ) fd_quic_conn_map_remove( state->conn_map, entry );
4175 :
4176 : /* insert into conn map */
4177 314385 : fd_quic_conn_map_t * insert_entry = fd_quic_conn_map_insert( state->conn_map, our_conn_id );
4178 :
4179 : /* if insert failed (should be impossible) fail, and do not remove connection
4180 : from free list */
4181 314385 : if( FD_UNLIKELY( insert_entry == NULL ) ) {
4182 : /* FIXME This has ~1e-6 probability of happening with 10M conns
4183 : Retry generating our_conn_id instead of logging a warning */
4184 0 : FD_LOG_WARNING(( "fd_quic_conn_create failed: failed to register new conn ID" ));
4185 0 : return NULL;
4186 0 : }
4187 :
4188 : /* set connection map insert_entry to new connection */
4189 314385 : insert_entry->conn = conn;
4190 :
4191 : /* remove from free list */
4192 314385 : state->free_conn_list = conn->free_conn_next;
4193 314385 : conn->free_conn_next = UINT_MAX;
4194 :
4195 : /* initialize connection members */
4196 314385 : fd_quic_conn_clear( conn );
4197 :
4198 314385 : conn->server = !!server;
4199 314385 : conn->our_conn_id = our_conn_id;
4200 314385 : conn->host = (fd_quic_net_endpoint_t){
4201 314385 : .ip_addr = self_ip_addr, /* may be 0, if outgoing */
4202 314385 : .udp_port = self_udp_port,
4203 314385 : };
4204 314385 : conn->conn_gen++;
4205 :
4206 :
4207 : /* pkt_meta */
4208 314385 : fd_quic_pkt_meta_tracker_init( &conn->pkt_meta_tracker,
4209 314385 : quic->limits.inflight_frame_cnt,
4210 314385 : state->pkt_meta_pool );
4211 :
4212 : /* Initialize streams */
4213 314385 : FD_QUIC_STREAM_LIST_SENTINEL( conn->send_streams );
4214 314385 : FD_QUIC_STREAM_LIST_SENTINEL( conn->used_streams );
4215 :
4216 : /* initialize stream_id members */
4217 314385 : fd_quic_conn_stream_rx_t * srx = conn->srx;
4218 314385 : fd_quic_transport_params_t * our_tp = &state->transport_params;
4219 314385 : srx->rx_hi_stream_id = server ? FD_QUIC_STREAM_TYPE_UNI_CLIENT : FD_QUIC_STREAM_TYPE_UNI_SERVER;
4220 314385 : srx->rx_sup_stream_id = server ? FD_QUIC_STREAM_TYPE_UNI_CLIENT : FD_QUIC_STREAM_TYPE_UNI_SERVER;
4221 314385 : conn->tx_next_stream_id = server ? FD_QUIC_STREAM_TYPE_UNI_SERVER : FD_QUIC_STREAM_TYPE_UNI_CLIENT;
4222 314385 : conn->tx_sup_stream_id = server ? FD_QUIC_STREAM_TYPE_UNI_SERVER : FD_QUIC_STREAM_TYPE_UNI_CLIENT;
4223 :
4224 314385 : srx->rx_max_data = our_tp->initial_max_data;
4225 :
4226 314385 : if( state->transport_params.initial_max_streams_uni_present ) {
4227 314385 : srx->rx_sup_stream_id = (state->transport_params.initial_max_streams_uni<<2) + FD_QUIC_STREAM_TYPE_UNI_CLIENT;
4228 314385 : }
4229 314385 : if( state->transport_params.initial_max_data ) {
4230 314385 : srx->rx_max_data = state->transport_params.initial_max_data;
4231 314385 : }
4232 :
4233 : /* points to free tx space */
4234 314385 : conn->tx_ptr = conn->tx_buf_conn;
4235 :
4236 314385 : conn->keys_avail = fd_uint_set_bit( 0U, fd_quic_enc_level_initial_id );
4237 :
4238 : /* Packet numbers left as 0
4239 : rfc9000: s12.3:
4240 : Packet numbers in each packet space start at 0.
4241 : Subsequent packets sent in the same packet number space
4242 : MUST increase the packet number by at least 1
4243 : rfc9002: s3
4244 : It is permitted for some packet numbers to never be used, leaving intentional gaps. */
4245 :
4246 314385 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_HANDSHAKE );
4247 :
4248 : /* start with minimum supported max datagram */
4249 : /* peers may allow more */
4250 314385 : conn->tx_max_datagram_sz = FD_QUIC_INITIAL_PAYLOAD_SZ_MAX;
4251 :
4252 : /* initial source connection id */
4253 314385 : conn->initial_source_conn_id = our_conn_id;
4254 :
4255 : /* peer connection id */
4256 314385 : conn->peer_cids[0] = *peer_conn_id;
4257 314385 : conn->peer[0].ip_addr = peer_ip_addr;
4258 314385 : conn->peer[0].udp_port = peer_udp_port;
4259 :
4260 314385 : fd_quic_ack_gen_init( conn->ack_gen );
4261 :
4262 : /* initial rtt */
4263 : /* overridden when acks start returning */
4264 314385 : fd_rtt_estimate_t * rtt = conn->rtt;
4265 :
4266 314385 : ulong peer_ack_delay_exponent = 3UL; /* by spec, default is 3 */
4267 314385 : conn->peer_ack_delay_scale = (float)( 1UL << peer_ack_delay_exponent ) * 1e3f;
4268 314385 : conn->peer_max_ack_delay_ns = 0.0f; /* starts at zero, since peers respond immediately to */
4269 : /* INITIAL and HANDSHAKE */
4270 : /* updated when we get transport parameters */
4271 314385 : rtt->smoothed_rtt = FD_QUIC_INITIAL_RTT_US * 1e3f;
4272 314385 : rtt->latest_rtt = FD_QUIC_INITIAL_RTT_US * 1e3f;
4273 314385 : rtt->min_rtt = FD_QUIC_INITIAL_RTT_US * 1e3f;
4274 314385 : rtt->var_rtt = FD_QUIC_INITIAL_RTT_US * 1e3f * 0.5f;
4275 314385 : conn->rtt_period_ns = FD_QUIC_RTT_PERIOD_US * 1e3f;
4276 :
4277 : /* idle timeout */
4278 314385 : conn->idle_timeout_ns = config->idle_timeout;
4279 314385 : conn->last_activity = state->now;
4280 314385 : if( !conn->last_activity ) FD_LOG_CRIT(( "last activity: %ld", conn->last_activity ));
4281 314385 : conn->let_die_time_ns = LONG_MAX;
4282 :
4283 : /* update metrics */
4284 314385 : quic->metrics.conn_alloc_cnt++;
4285 314385 : quic->metrics.conn_created_cnt++;
4286 :
4287 314385 : fd_quic_svc_timers_init_conn( conn );
4288 :
4289 : /* prep idle timeout or keep alive at idle timeout/2 */
4290 314385 : long delay = quic->config.idle_timeout>>(quic->config.keep_alive);
4291 314385 : fd_quic_svc_prep_schedule( conn, state->now+delay );
4292 :
4293 : /* return connection */
4294 314385 : return conn;
4295 314385 : }
4296 :
4297 : long
4298 147147 : fd_quic_get_next_wakeup( fd_quic_t * quic ) {
4299 147147 : fd_quic_state_t * state = fd_quic_get_state( quic );
4300 147147 : long now = state->now;
4301 147147 : fd_quic_svc_event_t next = fd_quic_svc_timers_next( state->svc_timers, now, 0 );
4302 147147 : return next.timeout;
4303 147147 : }
4304 :
4305 : /* frame handling function default definitions */
4306 : static ulong
4307 : fd_quic_handle_padding_frame(
4308 : fd_quic_frame_ctx_t * ctx FD_PARAM_UNUSED,
4309 : fd_quic_padding_frame_t * data FD_PARAM_UNUSED,
4310 : uchar const * const p0,
4311 6060 : ulong p_sz ) {
4312 6060 : uchar const * p = p0;
4313 6060 : uchar const * const p_end = p + p_sz;
4314 5993388 : while( p<p_end && p[0]==0 ) p++;
4315 6060 : return (ulong)( p - p0 );
4316 6060 : }
4317 :
4318 : static ulong
4319 : fd_quic_handle_ping_frame(
4320 : fd_quic_frame_ctx_t * ctx,
4321 : fd_quic_ping_frame_t * data FD_PARAM_UNUSED,
4322 : uchar const * p0,
4323 240 : ulong p_sz ) {
4324 240 : FD_DTRACE_PROBE_1( quic_handle_ping_frame, ctx->conn->our_conn_id );
4325 : /* skip pings and pads */
4326 240 : uchar const * p = p0;
4327 240 : uchar const * const p_end = p + p_sz;
4328 4020 : while( p < p_end && ((uint)p[0] & 0xfeu) == 0 ) p++;
4329 240 : return (ulong)( p - p0 );
4330 240 : }
4331 :
4332 : /* Retry packet metadata
4333 : This will force pkt_meta to be returned to the free list
4334 : for use. It does so by finding unack'ed packet metadata
4335 : and setting the data up for retransmission.
4336 : Set force to 1 to force pkt_meta to be reclaimed even if
4337 : the ack timer hasn't expired. This is used when pkt_meta
4338 : is required immediately and none is available */
4339 : void
4340 : fd_quic_pkt_meta_retry( fd_quic_t * quic,
4341 : fd_quic_conn_t * conn,
4342 : int force,
4343 13779737 : uint arg_enc_level ) {
4344 13779737 : fd_quic_conn_stream_rx_t * srx = conn->srx;
4345 :
4346 13779737 : long now = fd_quic_get_state( quic )->now;
4347 :
4348 : /* minimum pkt_meta required to be freed
4349 : If not forcing, 0 is applicable
4350 : Otherwise, we should allow for a normal packet, which
4351 : will likely consist of the following:
4352 : 1 ack
4353 : 1 max streams
4354 : 1 max data
4355 : 1 stream data */
4356 13779737 : ulong min_freed = force ? 4U : 0U;
4357 :
4358 : /* count of freed pkt_meta */
4359 13779737 : ulong cnt_freed = 0u;
4360 :
4361 13779737 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
4362 13779737 : fd_quic_pkt_meta_t * pool = tracker->pool;
4363 :
4364 : /* used for metric tracking */
4365 13779737 : ulong prev_retx_pkt_num[FD_QUIC_NUM_ENC_LEVELS] = { ~0ul, ~0ul, ~0ul, ~0ul };
4366 :
4367 13779752 : while(1) {
4368 : /* find earliest expiring pkt_meta, over smallest pkt number at each enc_level */
4369 13779752 : uint enc_level = arg_enc_level;
4370 13779752 : uint peer_enc_level = conn->peer_enc_level;
4371 13779752 : long expiry = LONG_MAX;
4372 13779752 : if( arg_enc_level == ~0u ) {
4373 68898760 : for( uint j = 0u; j < 4u; ++j ) {
4374 : /* TODO this only checks smallest pkt number,
4375 : assuming that pkt numbers are monotonically increasing
4376 : over time. So it checks in 'sent' time order, but not expiry time. */
4377 55119008 : #if 1
4378 55119008 : fd_quic_pkt_meta_t * pkt_meta = fd_quic_pkt_meta_min( &tracker->sent_pkt_metas[j], pool );
4379 55119008 : if( !pkt_meta ) continue;
4380 :
4381 13320410 : if( enc_level == ~0u || pkt_meta->expiry < expiry ) {
4382 13320410 : enc_level = j;
4383 13320410 : expiry = pkt_meta->expiry;
4384 13320410 : }
4385 : #else
4386 : fd_quic_pkt_meta_t * pkt_meta = pool->sent_pkt_meta[j].head;
4387 : while( pkt_meta ) {
4388 : if( enc_level == ~0u || pkt_meta->expiry < expiry ) {
4389 : enc_level = j;
4390 : expiry = pkt_meta->expiry;
4391 : }
4392 : if( enc_level < peer_enc_level ) break;
4393 : pkt_meta = pkt_meta->next;
4394 : }
4395 : if( enc_level != ~0u ) break;
4396 : #endif
4397 13320410 : }
4398 13779752 : } else {
4399 0 : fd_quic_pkt_meta_t * pkt_meta = fd_quic_pkt_meta_min( &tracker->sent_pkt_metas[enc_level], pool );
4400 0 : if( !pkt_meta ) {
4401 0 : return;
4402 0 : }
4403 :
4404 0 : expiry = pkt_meta->expiry;
4405 0 : }
4406 :
4407 13779752 : if( enc_level == ~0u ) return;
4408 :
4409 13320410 : int exit = 0;
4410 13320410 : if( force ) {
4411 : /* we're forcing, quit when we've freed enough */
4412 0 : if( cnt_freed >= min_freed ) exit = 1;
4413 13320410 : } else {
4414 : /* not forcing, so quit if nothing has expired */
4415 13320410 : if( expiry > now ) {
4416 13320395 : exit = 1;
4417 13320395 : }
4418 13320410 : }
4419 :
4420 13320410 : if( exit ) {
4421 : /* safe even when expiry is LONG_MAX, because prep_schedule takes min */
4422 13320395 : fd_quic_svc_prep_schedule( conn, expiry );
4423 13320395 : return;
4424 13320395 : };
4425 :
4426 15 : fd_quic_pkt_meta_t * pkt_meta = fd_quic_pkt_meta_min( &tracker->sent_pkt_metas[enc_level], pool );
4427 :
4428 : /* already moved to another enc_level */
4429 15 : if( enc_level < peer_enc_level ) {
4430 0 : cnt_freed += fd_quic_abandon_enc_level( conn, peer_enc_level );
4431 0 : continue;
4432 0 : }
4433 :
4434 15 : quic->metrics.pkt_retransmissions_cnt += !(pkt_meta->key.pkt_num == prev_retx_pkt_num[enc_level]);
4435 15 : prev_retx_pkt_num[enc_level] = pkt_meta->key.pkt_num;
4436 :
4437 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);
4438 :
4439 : /* set the data to retry */
4440 15 : uint type = pkt_meta->key.type;
4441 15 : switch( type ) {
4442 0 : case FD_QUIC_PKT_META_TYPE_HS_DATA:
4443 0 : do {
4444 0 : ulong offset = fd_ulong_max( conn->hs_ackd_bytes[enc_level], pkt_meta->val.range.offset_lo );
4445 0 : if( offset < conn->hs_sent_bytes[enc_level] ) {
4446 0 : conn->hs_sent_bytes[enc_level] = offset;
4447 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4448 0 : }
4449 0 : } while(0);
4450 0 : break;
4451 :
4452 0 : case FD_QUIC_PKT_META_TYPE_STREAM:
4453 0 : do {
4454 0 : ulong stream_id = pkt_meta->key.stream_id;
4455 :
4456 : /* find the stream */
4457 0 : fd_quic_stream_t * stream = NULL;
4458 0 : fd_quic_stream_map_t * stream_entry = fd_quic_stream_map_query( conn->stream_map, stream_id, NULL );
4459 0 : if( FD_LIKELY( stream_entry && stream_entry->stream &&
4460 0 : ( stream_entry->stream->stream_flags & FD_QUIC_STREAM_FLAGS_DEAD ) == 0 ) ) {
4461 0 : stream = stream_entry->stream;
4462 :
4463 : /* do not try sending data that has been acked */
4464 0 : ulong offset = fd_ulong_max( pkt_meta->val.range.offset_lo, stream->tx_buf.tail );
4465 :
4466 : /* any data left to retry? */
4467 0 : stream->tx_sent = fd_ulong_min( stream->tx_sent, offset );
4468 :
4469 : /* do we have anything to send? */
4470 : /* TODO may need to send fin, also */
4471 0 : if( FD_LIKELY( stream->tx_sent < stream->tx_buf.head ) ) {
4472 :
4473 : /* insert into send list */
4474 0 : FD_QUIC_STREAM_LIST_REMOVE( stream );
4475 0 : FD_QUIC_STREAM_LIST_INSERT_BEFORE( conn->send_streams, stream );
4476 :
4477 : /* set the data to go out on the next packet */
4478 0 : stream->stream_flags |= FD_QUIC_STREAM_FLAGS_UNSENT; /* we have unsent data */
4479 0 : stream->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4480 0 : } else {
4481 : /* fd_quic_tx_stream_free also notifies the user */
4482 0 : fd_quic_tx_stream_free( conn->quic, conn, stream, FD_QUIC_STREAM_NOTIFY_END );
4483 0 : }
4484 0 : }
4485 0 : } while(0);
4486 0 : break;
4487 :
4488 0 : case FD_QUIC_PKT_META_TYPE_HS_DONE:
4489 0 : if( FD_LIKELY( !conn->handshake_done_ackd ) ) {
4490 0 : conn->handshake_done_send = 1;
4491 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4492 0 : }
4493 0 : break;
4494 :
4495 0 : case FD_QUIC_PKT_META_TYPE_MAX_DATA:
4496 0 : if( srx->rx_max_data_ackd < srx->rx_max_data ) {
4497 0 : conn->flags |= FD_QUIC_CONN_FLAGS_MAX_DATA;
4498 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4499 0 : }
4500 0 : break;
4501 :
4502 0 : case FD_QUIC_PKT_META_TYPE_MAX_STREAMS_UNIDIR:
4503 0 : do {
4504 : /* do we still need to send? */
4505 : /* get required value */
4506 0 : ulong max_streams_unidir = srx->rx_sup_stream_id >> 2;
4507 :
4508 0 : if( max_streams_unidir > srx->rx_max_streams_unidir_ackd ) {
4509 : /* set the data to go out on the next packet */
4510 0 : conn->flags |= FD_QUIC_CONN_FLAGS_MAX_STREAMS_UNIDIR;
4511 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4512 0 : }
4513 0 : } while(0);
4514 0 : break;
4515 :
4516 0 : case FD_QUIC_PKT_META_TYPE_CLOSE:
4517 0 : conn->flags &= ~FD_QUIC_CONN_FLAGS_CLOSE_SENT;
4518 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4519 0 : break;
4520 :
4521 15 : case FD_QUIC_PKT_META_TYPE_PING:
4522 15 : conn->flags = ( conn->flags & ~FD_QUIC_CONN_FLAGS_PING_SENT )
4523 15 : | FD_QUIC_CONN_FLAGS_PING;
4524 15 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4525 15 : break;
4526 15 : }
4527 :
4528 : /* reschedule to ensure the data gets processed */
4529 15 : fd_quic_svc_prep_schedule_now( conn );
4530 :
4531 : /* free pkt_meta */
4532 15 : fd_quic_pkt_meta_remove_range( &tracker->sent_pkt_metas[enc_level],
4533 15 : pool,
4534 15 : pkt_meta->key.pkt_num,
4535 15 : pkt_meta->key.pkt_num );
4536 :
4537 15 : conn->used_pkt_meta -= 1;
4538 15 : cnt_freed++;
4539 15 : }
4540 13779737 : }
4541 :
4542 : /* reclaim resources associated with packet metadata
4543 : this is called in response to received acks */
4544 : void
4545 : fd_quic_reclaim_pkt_meta( fd_quic_conn_t * conn,
4546 : fd_quic_pkt_meta_t * pkt_meta,
4547 13570524 : uint enc_level ) {
4548 13570524 : fd_quic_conn_stream_rx_t * srx = conn->srx;
4549 :
4550 13570524 : uint type = pkt_meta->key.type;
4551 13570524 : fd_quic_range_t range = pkt_meta->val.range;
4552 :
4553 13570524 : switch( type ) {
4554 :
4555 12 : case FD_QUIC_PKT_META_TYPE_PING:
4556 12 : do {
4557 12 : conn->flags &= ~( FD_QUIC_CONN_FLAGS_PING | FD_QUIC_CONN_FLAGS_PING_SENT );
4558 12 : } while(0);
4559 12 : break;
4560 :
4561 25146 : case FD_QUIC_PKT_META_TYPE_HS_DATA:
4562 25146 : do {
4563 : /* Note that tls_hs could already be freed */
4564 : /* is this ack'ing the next consecutive bytes?
4565 : if so, we can increase the ack'd bytes
4566 : if not, we retransmit the bytes expected to be ack'd
4567 : we assume a gap means a dropped packet, and
4568 : this policy allows us to free up the pkt_meta here */
4569 25146 : ulong hs_ackd_bytes = conn->hs_ackd_bytes[enc_level];
4570 25146 : if( range.offset_lo <= hs_ackd_bytes ) {
4571 25146 : hs_ackd_bytes = conn->hs_ackd_bytes[enc_level]
4572 25146 : = fd_ulong_max( hs_ackd_bytes, range.offset_hi );
4573 :
4574 : /* remove any unused hs_data */
4575 25146 : fd_quic_tls_hs_data_t * hs_data = NULL;
4576 :
4577 25146 : hs_data = fd_quic_tls_get_hs_data( conn->tls_hs, enc_level );
4578 67566 : while( hs_data && hs_data->offset + hs_data->data_sz <= hs_ackd_bytes ) {
4579 42420 : fd_quic_tls_pop_hs_data( conn->tls_hs, enc_level );
4580 42420 : hs_data = fd_quic_tls_get_hs_data( conn->tls_hs, enc_level );
4581 42420 : }
4582 25146 : } else {
4583 0 : conn->hs_sent_bytes[enc_level] =
4584 0 : fd_ulong_min( conn->hs_sent_bytes[enc_level], hs_ackd_bytes );
4585 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4586 0 : }
4587 25146 : } while(0);
4588 25146 : break;
4589 :
4590 6060 : case FD_QUIC_PKT_META_TYPE_HS_DONE:
4591 6060 : do {
4592 6060 : conn->handshake_done_ackd = 1;
4593 6060 : conn->handshake_done_send = 0;
4594 6060 : if( FD_LIKELY( conn->tls_hs ) ) {
4595 6060 : fd_quic_state_t * state = fd_quic_get_state( conn->quic );
4596 6060 : fd_quic_tls_hs_delete( conn->tls_hs );
4597 6060 : fd_quic_tls_hs_cache_ele_remove( &state->hs_cache, conn->tls_hs, state->hs_pool );
4598 6060 : fd_quic_tls_hs_pool_ele_release( state->hs_pool, conn->tls_hs );
4599 6060 : conn->tls_hs = NULL;
4600 6060 : }
4601 6060 : } while(0);
4602 6060 : break;
4603 :
4604 0 : case FD_QUIC_PKT_META_TYPE_MAX_DATA:
4605 0 : do {
4606 0 : ulong max_data_ackd = pkt_meta->val.scalar;
4607 :
4608 : /* ack can only increase max_data_ackd */
4609 0 : max_data_ackd = fd_ulong_max( max_data_ackd, srx->rx_max_data_ackd );
4610 :
4611 : /* max_data_ackd > rx_max_data is a protocol violation */
4612 0 : if( FD_UNLIKELY( max_data_ackd > srx->rx_max_data ) ) {
4613 : /* this is a protocol violation, so inform the peer */
4614 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
4615 0 : return;
4616 0 : }
4617 :
4618 : /* clear flag only if acked value == current value */
4619 0 : if( FD_LIKELY( max_data_ackd == srx->rx_max_data ) ) {
4620 0 : conn->flags &= ~FD_QUIC_CONN_FLAGS_MAX_DATA;
4621 0 : }
4622 :
4623 : /* set the ackd value */
4624 0 : srx->rx_max_data_ackd = max_data_ackd;
4625 0 : } while(0);
4626 0 : break;
4627 :
4628 0 : case FD_QUIC_PKT_META_TYPE_MAX_STREAMS_UNIDIR:
4629 0 : do {
4630 0 : ulong max_streams_unidir_ackd = pkt_meta->val.scalar;
4631 :
4632 : /* ack can only increase max_streams_unidir_ackd */
4633 0 : max_streams_unidir_ackd = fd_ulong_max( max_streams_unidir_ackd, srx->rx_max_streams_unidir_ackd );
4634 :
4635 : /* get required value */
4636 0 : ulong max_streams_unidir = srx->rx_sup_stream_id >> 2;
4637 :
4638 : /* clear flag only if acked value == current value */
4639 0 : if( FD_LIKELY( max_streams_unidir_ackd == max_streams_unidir ) ) {
4640 0 : conn->flags &= ~FD_QUIC_CONN_FLAGS_MAX_STREAMS_UNIDIR;
4641 0 : }
4642 :
4643 : /* set the ackd value */
4644 0 : srx->rx_max_streams_unidir_ackd = max_streams_unidir_ackd;
4645 0 : } while(0);
4646 0 : break;
4647 :
4648 13539306 : case FD_QUIC_PKT_META_TYPE_STREAM:
4649 13539306 : do {
4650 13539306 : ulong stream_id = pkt_meta->key.stream_id;
4651 13539306 : fd_quic_range_t range = pkt_meta->val.range;
4652 :
4653 : /* find the stream */
4654 13539306 : fd_quic_stream_t * stream = NULL;
4655 13539306 : fd_quic_stream_map_t * stream_entry = fd_quic_stream_map_query( conn->stream_map, stream_id, NULL );
4656 13539306 : if( FD_LIKELY( stream_entry && stream_entry->stream &&
4657 13539306 : ( stream_entry->stream->stream_flags & FD_QUIC_STREAM_FLAGS_DEAD ) == 0 ) ) {
4658 13539306 : stream = stream_entry->stream;
4659 :
4660 : /* do not try sending data that has been acked */
4661 :
4662 13539306 : ulong tx_tail = stream->tx_buf.tail;
4663 13539306 : ulong tx_sent = stream->tx_sent;
4664 :
4665 : /* ignore bytes which were already acked */
4666 13539306 : if( range.offset_lo < tx_tail ) range.offset_lo = tx_tail;
4667 :
4668 : /* verify offset_hi */
4669 13539306 : if( FD_UNLIKELY( range.offset_hi > stream->tx_buf.head ) ) {
4670 : /* offset_hi in the pkt_meta (the highest byte offset in the packet */
4671 : /* should never exceed tx_buf.head - the highest byte offset in the */
4672 : /* stream */
4673 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_INTERNAL_ERROR, __LINE__ );
4674 0 : return;
4675 13539306 : } else {
4676 : /* did they ack the first byte in the range? */
4677 13539306 : if( FD_LIKELY( range.offset_lo == tx_tail ) ) {
4678 :
4679 : /* then simply move the tail up */
4680 13539306 : tx_tail = range.offset_hi;
4681 :
4682 : /* need to clear the acks */
4683 13539306 : ulong tx_mask = stream->tx_buf.cap - 1ul;
4684 13539306 : uchar * tx_ack = stream->tx_ack;
4685 1740357489 : for( ulong j = range.offset_lo; j < range.offset_hi; ) {
4686 1726818183 : ulong k = j & tx_mask;
4687 1726818183 : if( ( k & 7ul ) == 0ul && j + 8ul <= range.offset_hi ) {
4688 : /* process 8 bits */
4689 1726399239 : tx_ack[k>>3ul] = 0;
4690 1726399239 : j+=8;
4691 1726399239 : } else {
4692 : /* process 1 bit */
4693 418944 : tx_ack[k>>3ul] &= (uchar)(0xff ^ ( 1ul << ( k & 7ul ) ) );
4694 418944 : j++;
4695 418944 : }
4696 1726818183 : }
4697 13539306 : } else {
4698 : /* set appropriate bits in tx_ack */
4699 : /* TODO optimize this */
4700 0 : ulong tx_mask = stream->tx_buf.cap - 1ul;
4701 0 : ulong cnt = range.offset_hi - range.offset_lo;
4702 0 : uchar * tx_ack = stream->tx_ack;
4703 0 : for( ulong j = 0ul; j < cnt; ) {
4704 0 : ulong k = ( j + range.offset_lo ) & tx_mask;
4705 0 : if( ( k & 7ul ) == 0ul && j + 8ul <= cnt ) {
4706 : /* set whole byte */
4707 0 : tx_ack[k>>3ul] = 0xffu;
4708 :
4709 0 : j += 8ul;
4710 0 : } else {
4711 : /* compiler is not smart enough to know ( 1u << ( k & 7u ) ) fits in a uchar */
4712 0 : tx_ack[k>>3ul] |= (uchar)( 1ul << ( k & 7ul ) );
4713 0 : j++;
4714 0 : }
4715 0 : }
4716 :
4717 : /* determine whether tx_tail may be moved up */
4718 0 : for( ulong j = tx_tail; j < tx_sent; ) {
4719 0 : ulong k = j & tx_mask;
4720 :
4721 : /* can we skip a whole byte? */
4722 0 : if( ( k & 7ul ) == 0ul && j + 8ul <= tx_sent && tx_ack[k>>3ul] == 0xffu ) {
4723 0 : tx_ack[k>>3ul] = 0u;
4724 0 : tx_tail += 8ul;
4725 :
4726 0 : j += 8ul;
4727 0 : } else {
4728 0 : if( tx_ack[k>>3ul] & ( 1u << ( k & 7u ) ) ) {
4729 0 : tx_ack[k>>3ul] = (uchar)( tx_ack[k>>3ul] & ~( 1u << ( k & 7u ) ) );
4730 0 : tx_tail++;
4731 0 : j++;
4732 0 : } else {
4733 0 : break;
4734 0 : }
4735 0 : }
4736 0 : }
4737 0 : }
4738 :
4739 : /* For convenience */
4740 13539306 : uint fin_state_mask = FD_QUIC_STREAM_STATE_TX_FIN | FD_QUIC_STREAM_STATE_RX_FIN;
4741 :
4742 : /* move up tail, and adjust to maintain circular queue invariants, and send
4743 : max_data and max_stream_data, if necessary */
4744 13539306 : if( tx_tail > stream->tx_buf.tail ) {
4745 13539300 : stream->tx_buf.tail = tx_tail;
4746 :
4747 : /* if we have data to send, reschedule */
4748 13539300 : if( fd_quic_buffer_used( &stream->tx_buf ) ) {
4749 16809 : stream->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4750 16809 : if( !FD_QUIC_STREAM_ACTION( stream ) ) {
4751 : /* going from 0 to nonzero, so insert into action list */
4752 9351 : FD_QUIC_STREAM_LIST_REMOVE( stream );
4753 9351 : FD_QUIC_STREAM_LIST_INSERT_BEFORE( conn->send_streams, stream );
4754 9351 : }
4755 :
4756 16809 : stream->stream_flags |= FD_QUIC_STREAM_FLAGS_UNSENT;
4757 :
4758 16809 : fd_quic_svc_prep_schedule_now( conn );
4759 13522491 : } else {
4760 : /* if no data to send, check whether fin bits are set */
4761 13522491 : if( ( stream->state & fin_state_mask ) == fin_state_mask ) {
4762 : /* fd_quic_tx_stream_free also notifies the user */
4763 13522485 : fd_quic_tx_stream_free( conn->quic, conn, stream, FD_QUIC_STREAM_NOTIFY_END );
4764 13522485 : }
4765 13522491 : }
4766 13539300 : } else if( tx_tail == stream->tx_buf.tail &&
4767 6 : ( stream->state & fin_state_mask ) == fin_state_mask ) {
4768 : /* fd_quic_tx_stream_free also notifies the user */
4769 6 : fd_quic_tx_stream_free( conn->quic, conn, stream, FD_QUIC_STREAM_NOTIFY_END );
4770 6 : }
4771 :
4772 : /* we could retransmit (timeout) the bytes which have not been acked (by implication) */
4773 13539306 : }
4774 13539306 : }
4775 13539306 : } while(0);
4776 13539306 : break;
4777 13570524 : }
4778 13570524 : }
4779 : /* process lost packets
4780 : * These packets will be declared lost and relevant data potentially resent */
4781 : void
4782 0 : fd_quic_process_lost( fd_quic_conn_t * conn, uint enc_level, ulong cnt ) {
4783 : /* start at oldest sent */
4784 0 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
4785 0 : fd_quic_pkt_meta_t * pool = tracker->pool;
4786 0 : fd_quic_pkt_meta_ds_t * sent = &tracker->sent_pkt_metas[enc_level];
4787 0 : ulong j = 0;
4788 :
4789 0 : for( fd_quic_pkt_meta_ds_fwd_iter_t iter = fd_quic_pkt_meta_ds_fwd_iter_init( sent, pool );
4790 0 : !fd_quic_pkt_meta_ds_fwd_iter_done( iter );
4791 0 : iter = fd_quic_pkt_meta_ds_fwd_iter_next( iter, pool ) ) {
4792 0 : fd_quic_pkt_meta_t * pkt_meta = fd_quic_pkt_meta_ds_fwd_iter_ele( iter, pool );
4793 0 : if( FD_LIKELY( j < cnt ) ) {
4794 0 : pkt_meta->expiry = 0; /* force expiry */
4795 0 : } else {
4796 0 : break;
4797 0 : }
4798 0 : j++;
4799 0 : }
4800 :
4801 : /* trigger the retries */
4802 0 : fd_quic_pkt_meta_retry( conn->quic, conn, 0 /* don't force */, enc_level );
4803 0 : }
4804 :
4805 : /* process ack range
4806 : applies to pkt_number in [largest_ack - ack_range, largest_ack] */
4807 : void
4808 : fd_quic_process_ack_range( fd_quic_conn_t * conn,
4809 : fd_quic_frame_ctx_t * context,
4810 : uint enc_level,
4811 : ulong largest_ack,
4812 : ulong ack_range,
4813 : int is_largest,
4814 : long now,
4815 226824 : ulong ack_delay ) {
4816 : /* FIXME: Close connection if peer ACKed a higher packet number than we sent */
4817 :
4818 226824 : fd_quic_pkt_t * pkt = context->pkt;
4819 :
4820 : /* inclusive range */
4821 226824 : ulong hi = largest_ack;
4822 226824 : ulong lo = largest_ack - ack_range;
4823 226824 : FD_DTRACE_PROBE_4( quic_process_ack_range, conn->our_conn_id, enc_level, lo, hi );
4824 :
4825 226824 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
4826 226824 : fd_quic_pkt_meta_t * pool = tracker->pool;
4827 226824 : fd_quic_pkt_meta_ds_t * sent = &tracker->sent_pkt_metas[enc_level];
4828 :
4829 : /* start at oldest sent */
4830 226824 : for( fd_quic_pkt_meta_ds_fwd_iter_t iter = fd_quic_pkt_meta_ds_idx_ge( sent, lo, pool );
4831 13785222 : !fd_quic_pkt_meta_ds_fwd_iter_done( iter );
4832 13558464 : iter = fd_quic_pkt_meta_ds_fwd_iter_next( iter, pool ) ) {
4833 13558464 : fd_quic_pkt_meta_t * e = fd_quic_pkt_meta_ds_fwd_iter_ele( iter, pool );
4834 13558464 : if( FD_UNLIKELY( e->key.pkt_num > hi ) ) break;
4835 13558398 : if( is_largest && e->key.pkt_num == hi && hi >= pkt->rtt_pkt_number ) {
4836 226638 : pkt->rtt_pkt_number = hi;
4837 226638 : pkt->rtt_ack_time = now - e->tx_time; /* in ns */
4838 226638 : pkt->rtt_ack_delay = ack_delay; /* in peer units */
4839 226638 : }
4840 13558398 : fd_quic_reclaim_pkt_meta( conn, e, enc_level );
4841 13558398 : }
4842 :
4843 226824 : conn->used_pkt_meta -= fd_quic_pkt_meta_remove_range( sent, pool, lo, hi );
4844 226824 : }
4845 :
4846 : static ulong
4847 : fd_quic_handle_ack_frame( fd_quic_frame_ctx_t * context,
4848 : fd_quic_ack_frame_t * data,
4849 : uchar const * p,
4850 226662 : ulong p_sz ) {
4851 226662 : fd_quic_conn_t * conn = context->conn;
4852 226662 : uint enc_level = context->pkt->enc_level;
4853 :
4854 226662 : if( FD_UNLIKELY( data->first_ack_range > data->largest_ack ) ) {
4855 : /* this is a protocol violation, so inform the peer */
4856 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
4857 0 : return FD_QUIC_PARSE_FAIL;
4858 0 : }
4859 :
4860 226662 : fd_quic_state_t * state = fd_quic_get_state( conn->quic );
4861 226662 : conn->last_ack = state->now;
4862 :
4863 : /* track lowest packet acked */
4864 226662 : ulong low_ack_pkt_number = data->largest_ack - data->first_ack_range;
4865 :
4866 : /* process ack range
4867 : applies to pkt_number in [largest_ack - first_ack_range, largest_ack] */
4868 226662 : fd_quic_process_ack_range( conn,
4869 226662 : context,
4870 226662 : enc_level,
4871 226662 : data->largest_ack,
4872 226662 : data->first_ack_range,
4873 226662 : 1 /* is_largest */,
4874 226662 : state->now,
4875 226662 : data->ack_delay );
4876 :
4877 226662 : uchar const * p_str = p;
4878 226662 : uchar const * p_end = p + p_sz;
4879 :
4880 226662 : ulong ack_range_count = data->ack_range_count;
4881 :
4882 : /* cur_pkt_number holds the packet number of the lowest processed
4883 : and acknowledged packet
4884 : This should always be a valid packet number >= 0 */
4885 226662 : ulong cur_pkt_number = data->largest_ack - data->first_ack_range;
4886 :
4887 : /* walk thru ack ranges */
4888 226692 : for( ulong j = 0UL; j < ack_range_count; ++j ) {
4889 54 : if( FD_UNLIKELY( p_end <= p ) ) {
4890 6 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
4891 6 : return FD_QUIC_PARSE_FAIL;
4892 6 : }
4893 :
4894 48 : fd_quic_ack_range_frag_t ack_range[1];
4895 48 : ulong rc = fd_quic_decode_ack_range_frag( ack_range, p, (ulong)( p_end - p ) );
4896 48 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
4897 6 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
4898 6 : return FD_QUIC_PARSE_FAIL;
4899 6 : }
4900 :
4901 : /* ensure we have ulong local vars, regardless of ack_range definition */
4902 42 : ulong gap = (ulong)ack_range->gap;
4903 42 : ulong length = (ulong)ack_range->length;
4904 :
4905 : /* sanity check before unsigned arithmetic */
4906 42 : if( FD_UNLIKELY( ( gap > ( ~0x3UL ) ) |
4907 42 : ( length > ( ~0x3UL ) ) ) ) {
4908 : /* This is an unreasonably large value, so fail with protocol violation
4909 : It's also likely impossible due to the encoding method */
4910 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
4911 0 : return FD_QUIC_PARSE_FAIL;
4912 0 : }
4913 :
4914 : /* The number of packet numbers to skip (they are not being acked) is
4915 : ack_range->gap + 2
4916 : This is +1 to get from the lowest acked packet to the highest unacked packet
4917 : and +1 because the count of packets in the gap is (ack_range->gap+1) */
4918 42 : ulong skip = gap + 2UL;
4919 :
4920 : /* verify the skip and length values are valid */
4921 42 : if( FD_UNLIKELY( skip + length > cur_pkt_number ) ) {
4922 : /* this is a protocol violation, so inform the peer */
4923 12 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
4924 12 : return FD_QUIC_PARSE_FAIL;
4925 12 : }
4926 :
4927 : /* track lowest */
4928 30 : ulong lo_pkt_number = cur_pkt_number - skip - length;
4929 30 : low_ack_pkt_number = fd_ulong_min( low_ack_pkt_number, lo_pkt_number );
4930 :
4931 : /* process ack range */
4932 30 : fd_quic_process_ack_range( conn,
4933 30 : context,
4934 30 : enc_level,
4935 30 : cur_pkt_number - skip,
4936 30 : length,
4937 30 : 0 /* is_largest */,
4938 30 : state->now,
4939 30 : 0 /* ack_delay not used here */ );
4940 :
4941 : /* Find the next lowest processed and acknowledged packet number
4942 : This should get us to the next lowest processed and acknowledged packet
4943 : number */
4944 30 : cur_pkt_number -= skip + length;
4945 :
4946 30 : p += rc;
4947 30 : }
4948 :
4949 : /* process lost packets */
4950 226638 : {
4951 226638 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
4952 226638 : fd_quic_pkt_meta_t * pool = tracker->pool;
4953 226638 : fd_quic_pkt_meta_ds_t * sent = &tracker->sent_pkt_metas[enc_level];
4954 226638 : fd_quic_pkt_meta_t * min_meta = fd_quic_pkt_meta_min( sent, pool );
4955 :
4956 226638 : if( FD_UNLIKELY( min_meta && min_meta->key.pkt_num < low_ack_pkt_number ) ) {
4957 6 : ulong skipped = 0;
4958 6 : for( fd_quic_pkt_meta_ds_fwd_iter_t iter = fd_quic_pkt_meta_ds_fwd_iter_init( sent, pool );
4959 12 : !fd_quic_pkt_meta_ds_fwd_iter_done( iter );
4960 6 : iter = fd_quic_pkt_meta_ds_fwd_iter_next( iter, pool ) ) {
4961 6 : fd_quic_pkt_meta_t * e = fd_quic_pkt_meta_ds_fwd_iter_ele( iter, pool );
4962 6 : if( FD_UNLIKELY( e->key.pkt_num >= low_ack_pkt_number ) ) break;
4963 6 : skipped++;
4964 6 : }
4965 :
4966 6 : if( FD_UNLIKELY( skipped > 3 ) ) {
4967 0 : fd_quic_process_lost( conn, enc_level, skipped - 3 );
4968 0 : }
4969 6 : }
4970 226638 : }
4971 :
4972 : /* ECN counts
4973 : we currently ignore them, but we must process them to get to the following bytes */
4974 226638 : if( data->type & 1U ) {
4975 0 : if( FD_UNLIKELY( p_end <= p ) ) {
4976 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
4977 0 : return FD_QUIC_PARSE_FAIL;
4978 0 : }
4979 :
4980 0 : fd_quic_ecn_counts_frag_t ecn_counts[1];
4981 0 : ulong rc = fd_quic_decode_ecn_counts_frag( ecn_counts, p, (ulong)( p_end - p ) );
4982 0 : if( rc == FD_QUIC_PARSE_FAIL ) {
4983 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
4984 0 : return FD_QUIC_PARSE_FAIL;
4985 0 : }
4986 :
4987 0 : p += rc;
4988 0 : }
4989 :
4990 226638 : return (ulong)( p - p_str );
4991 226638 : }
4992 :
4993 : static ulong
4994 : fd_quic_handle_reset_stream_frame(
4995 : fd_quic_frame_ctx_t * context,
4996 : fd_quic_reset_stream_frame_t * data,
4997 : uchar const * p FD_PARAM_UNUSED,
4998 0 : ulong p_sz FD_PARAM_UNUSED ) {
4999 : /* TODO implement */
5000 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 );
5001 0 : return 0UL;
5002 0 : }
5003 :
5004 : static ulong
5005 : fd_quic_handle_stop_sending_frame(
5006 : fd_quic_frame_ctx_t * context,
5007 : fd_quic_stop_sending_frame_t * data,
5008 : uchar const * p FD_PARAM_UNUSED,
5009 0 : ulong p_sz FD_PARAM_UNUSED ) {
5010 0 : FD_DTRACE_PROBE_3( quic_handle_stop_sending_frame, context->conn->our_conn_id, data->stream_id, data->app_proto_err_code );
5011 0 : return 0UL;
5012 0 : }
5013 :
5014 : static ulong
5015 : fd_quic_handle_new_token_frame(
5016 : fd_quic_frame_ctx_t * context,
5017 : fd_quic_new_token_frame_t * data,
5018 : uchar const * p FD_PARAM_UNUSED,
5019 0 : ulong p_sz FD_PARAM_UNUSED ) {
5020 : /* FIXME A server MUST treat receipt of a NEW_TOKEN frame as a connection error of type PROTOCOL_VIOLATION. */
5021 0 : (void)data;
5022 0 : FD_DTRACE_PROBE_1( quic_handle_new_token_frame, context->conn->our_conn_id );
5023 0 : return 0UL;
5024 0 : }
5025 :
5026 : void
5027 : fd_quic_tx_stream_free( fd_quic_t * quic,
5028 : fd_quic_conn_t * conn,
5029 : fd_quic_stream_t * stream,
5030 13534646 : int code ) {
5031 :
5032 : /* TODO rename FD_QUIC_NOTIFY_END to FD_QUIC_STREAM_NOTIFY_END et al */
5033 13534646 : if( FD_LIKELY( stream->state != FD_QUIC_STREAM_STATE_UNUSED ) ) {
5034 13534646 : fd_quic_cb_stream_notify( quic, stream, stream->context, code );
5035 13534646 : stream->state = FD_QUIC_STREAM_STATE_UNUSED;
5036 13534646 : }
5037 :
5038 13534646 : ulong stream_id = stream->stream_id;
5039 :
5040 : /* remove from stream map */
5041 13534646 : fd_quic_stream_map_t * stream_map = conn->stream_map;
5042 13534646 : fd_quic_stream_map_t * stream_entry = fd_quic_stream_map_query( stream_map, stream_id, NULL );
5043 13534646 : if( FD_LIKELY( stream_entry ) ) {
5044 13534646 : if( FD_LIKELY( stream_entry->stream ) ) {
5045 13534646 : stream_entry->stream->stream_flags = FD_QUIC_STREAM_FLAGS_DEAD;
5046 13534646 : }
5047 13534646 : fd_quic_stream_map_remove( stream_map, stream_entry );
5048 13534646 : }
5049 :
5050 : /* remove from list - idempotent */
5051 13534646 : FD_QUIC_STREAM_LIST_REMOVE( stream );
5052 13534646 : stream->stream_flags = FD_QUIC_STREAM_FLAGS_DEAD;
5053 13534646 : stream->stream_id = ~0UL;
5054 :
5055 : /* add to stream_pool */
5056 13534646 : fd_quic_state_t * state = fd_quic_get_state( quic );
5057 13534646 : fd_quic_stream_pool_free( state->stream_pool, stream );
5058 :
5059 13534646 : }
5060 :
5061 :
5062 : static inline __attribute__((always_inline)) ulong
5063 : fd_quic_handle_stream_frame(
5064 : fd_quic_frame_ctx_t * context,
5065 : uchar const * p,
5066 : ulong p_sz,
5067 : ulong stream_id,
5068 : ulong offset,
5069 : ulong data_sz,
5070 76704335 : int fin ) {
5071 76704335 : fd_quic_t * quic = context->quic;
5072 76704335 : fd_quic_conn_t * conn = context->conn;
5073 76704335 : fd_quic_pkt_t * pkt = context->pkt;
5074 :
5075 76704335 : FD_DTRACE_PROBE_5( quic_handle_stream_frame, conn->our_conn_id, stream_id, offset, data_sz, fin );
5076 :
5077 : /* stream_id type check */
5078 76704335 : ulong stream_type = stream_id & 3UL;
5079 76704335 : if( FD_UNLIKELY( stream_type != ( conn->server ? FD_QUIC_STREAM_TYPE_UNI_CLIENT : FD_QUIC_STREAM_TYPE_UNI_SERVER ) ) ) {
5080 0 : FD_DEBUG( FD_LOG_DEBUG(( "Received forbidden stream type" )); )
5081 : /* Technically should switch between STREAM_LIMIT_ERROR and STREAM_STATE_ERROR here */
5082 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_STREAM_LIMIT_ERROR, __LINE__ );
5083 0 : return FD_QUIC_PARSE_FAIL;
5084 0 : }
5085 :
5086 : /* length check */
5087 76704335 : if( FD_UNLIKELY( data_sz > p_sz ) ) {
5088 0 : FD_DEBUG( FD_LOG_DEBUG(( "Stream header indicates %lu bytes length, but only have %lu", data_sz, p_sz )); )
5089 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
5090 0 : return FD_QUIC_PARSE_FAIL;
5091 0 : }
5092 :
5093 76704335 : conn->unacked_sz += data_sz;
5094 :
5095 : /* stream_id outside allowed range - protocol error */
5096 76704335 : if( FD_UNLIKELY( stream_id >= conn->srx->rx_sup_stream_id ) ) {
5097 3 : FD_DEBUG( FD_LOG_DEBUG(( "Stream ID violation detected" )); )
5098 3 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_STREAM_LIMIT_ERROR, __LINE__ );
5099 3 : return FD_QUIC_PARSE_FAIL;
5100 3 : }
5101 :
5102 : /* A receiver MUST close the connection with an error of type FLOW_CONTROL_ERROR if the sender
5103 : violates the advertised connection or stream data limits */
5104 76704332 : if( FD_UNLIKELY( quic->config.initial_rx_max_stream_data < offset + data_sz ) ) {
5105 3 : FD_DEBUG( FD_LOG_DEBUG(( "Stream data limit exceeded" )); )
5106 3 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FLOW_CONTROL_ERROR, __LINE__ );
5107 3 : return FD_QUIC_PARSE_FAIL;
5108 3 : }
5109 :
5110 76704329 : int rx_res = fd_quic_cb_stream_rx( quic, conn, stream_id, offset, p, data_sz, fin );
5111 76704329 : pkt->ack_flag |= fd_uint_if( rx_res==FD_QUIC_SUCCESS, 0U, ACK_FLAG_CANCEL );
5112 :
5113 : /* packet bytes consumed */
5114 76704329 : return data_sz;
5115 76704332 : }
5116 :
5117 : static ulong
5118 : fd_quic_handle_stream_8_frame(
5119 : fd_quic_frame_ctx_t * context,
5120 : fd_quic_stream_8_frame_t * data,
5121 : uchar const * p,
5122 0 : ulong p_sz ) {
5123 0 : return fd_quic_handle_stream_frame( context, p, p_sz, data->stream_id, 0UL, p_sz, data->type&1 );
5124 0 : }
5125 :
5126 : static ulong
5127 : fd_quic_handle_stream_a_frame(
5128 : fd_quic_frame_ctx_t * context,
5129 : fd_quic_stream_a_frame_t * data,
5130 : uchar const * p,
5131 76687469 : ulong p_sz ) {
5132 76687469 : return fd_quic_handle_stream_frame( context, p, p_sz, data->stream_id, 0UL, data->length, data->type&1 );
5133 76687469 : }
5134 :
5135 : static ulong
5136 : fd_quic_handle_stream_c_frame(
5137 : fd_quic_frame_ctx_t * context,
5138 : fd_quic_stream_c_frame_t * data,
5139 : uchar const * p,
5140 0 : ulong p_sz ) {
5141 0 : return fd_quic_handle_stream_frame( context, p, p_sz, data->stream_id, data->offset, p_sz, data->type&1 );
5142 0 : }
5143 :
5144 : static ulong
5145 : fd_quic_handle_stream_e_frame(
5146 : fd_quic_frame_ctx_t * context,
5147 : fd_quic_stream_e_frame_t * data,
5148 : uchar const * p,
5149 16866 : ulong p_sz ) {
5150 16866 : return fd_quic_handle_stream_frame( context, p, p_sz, data->stream_id, data->offset, data->length, data->type&1 );
5151 16866 : }
5152 :
5153 : static ulong
5154 : fd_quic_handle_max_data_frame(
5155 : fd_quic_frame_ctx_t * context,
5156 : fd_quic_max_data_frame_t * data,
5157 : uchar const * p FD_PARAM_UNUSED,
5158 6 : ulong p_sz FD_PARAM_UNUSED ) {
5159 6 : fd_quic_conn_t * conn = context->conn;
5160 :
5161 6 : ulong max_data_old = conn->tx_max_data;
5162 6 : ulong max_data_new = data->max_data;
5163 6 : FD_DTRACE_PROBE_3( quic_handle_max_data_frame, conn->our_conn_id, max_data_new, max_data_old );
5164 :
5165 : /* max data is only allowed to increase the limit. Transgressing frames
5166 : are silently ignored */
5167 6 : conn->tx_max_data = fd_ulong_max( max_data_old, max_data_new );
5168 6 : return 0; /* no additional bytes consumed from buffer */
5169 6 : }
5170 :
5171 : static ulong
5172 : fd_quic_handle_max_stream_data_frame(
5173 : fd_quic_frame_ctx_t * context,
5174 : fd_quic_max_stream_data_frame_t * data,
5175 : uchar const * p FD_PARAM_UNUSED,
5176 0 : ulong p_sz FD_PARAM_UNUSED ) {
5177 : /* FIXME unsupported for now */
5178 0 : FD_DTRACE_PROBE_3( quic_handle_max_stream_data_frame, context->conn->our_conn_id, data->stream_id, data->max_stream_data );
5179 0 : return 0;
5180 0 : }
5181 :
5182 : static ulong
5183 : fd_quic_handle_max_streams_frame(
5184 : fd_quic_frame_ctx_t * context,
5185 : fd_quic_max_streams_frame_t * data,
5186 : uchar const * p FD_PARAM_UNUSED,
5187 9 : ulong p_sz FD_PARAM_UNUSED ) {
5188 9 : fd_quic_conn_t * conn = context->conn;
5189 9 : FD_DTRACE_PROBE_3( quic_handle_max_streams_frame, conn->our_conn_id, data->type, data->max_streams );
5190 :
5191 9 : if( data->type == 0x13 ) {
5192 : /* Only handle unidirectional streams */
5193 6 : ulong type = (ulong)conn->server | 2UL;
5194 6 : ulong peer_sup_stream_id = data->max_streams * 4UL + type;
5195 6 : conn->tx_sup_stream_id = fd_ulong_max( peer_sup_stream_id, conn->tx_sup_stream_id );
5196 6 : }
5197 :
5198 9 : return 0;
5199 9 : }
5200 :
5201 : static ulong
5202 : fd_quic_handle_data_blocked_frame(
5203 : fd_quic_frame_ctx_t * context,
5204 : fd_quic_data_blocked_frame_t * data,
5205 : uchar const * p FD_PARAM_UNUSED,
5206 0 : ulong p_sz FD_PARAM_UNUSED ) {
5207 0 : FD_DTRACE_PROBE_2( quic_handle_data_blocked, context->conn->our_conn_id, data->max_data );
5208 :
5209 : /* Since we do not do runtime allocations, we will not attempt
5210 : to find more memory in the case of DATA_BLOCKED. */
5211 0 : return 0;
5212 0 : }
5213 :
5214 : static ulong
5215 : fd_quic_handle_stream_data_blocked_frame(
5216 : fd_quic_frame_ctx_t * context,
5217 : fd_quic_stream_data_blocked_frame_t * data,
5218 : uchar const * p FD_PARAM_UNUSED,
5219 0 : ulong p_sz FD_PARAM_UNUSED ) {
5220 0 : FD_DTRACE_PROBE_3( quic_handle_stream_data_blocked, context->conn->our_conn_id, data->stream_id, data->max_stream_data );
5221 :
5222 : /* Since we do not do runtime allocations, we will not attempt
5223 : to find more memory in the case of STREAM_DATA_BLOCKED.*/
5224 0 : (void)data;
5225 0 : return 0;
5226 0 : }
5227 :
5228 : static ulong
5229 : fd_quic_handle_streams_blocked_frame(
5230 : fd_quic_frame_ctx_t * context,
5231 : fd_quic_streams_blocked_frame_t * data,
5232 : uchar const * p FD_PARAM_UNUSED,
5233 0 : ulong p_sz FD_PARAM_UNUSED ) {
5234 0 : FD_DTRACE_PROBE_2( quic_handle_streams_blocked_frame, context->conn->our_conn_id, data->max_streams );
5235 :
5236 : /* STREAMS_BLOCKED should be sent by client when it wants
5237 : to use a new stream, but is unable to due to the max_streams
5238 : value
5239 : We can support this in the future, but as of 2024-Dec, the
5240 : Agave TPU client does not currently use it */
5241 0 : return 0;
5242 0 : }
5243 :
5244 : static ulong
5245 : fd_quic_handle_new_conn_id_frame(
5246 : fd_quic_frame_ctx_t * context,
5247 : fd_quic_new_conn_id_frame_t * data,
5248 : uchar const * p FD_PARAM_UNUSED,
5249 0 : ulong p_sz FD_PARAM_UNUSED ) {
5250 : /* FIXME This is a mandatory feature but we don't support it yet */
5251 0 : FD_DTRACE_PROBE_1( quic_handle_new_conn_id_frame, context->conn->our_conn_id );
5252 0 : (void)data;
5253 0 : return 0;
5254 0 : }
5255 :
5256 : static ulong
5257 : fd_quic_handle_retire_conn_id_frame(
5258 : fd_quic_frame_ctx_t * context,
5259 : fd_quic_retire_conn_id_frame_t * data,
5260 : uchar const * p FD_PARAM_UNUSED,
5261 0 : ulong p_sz FD_PARAM_UNUSED ) {
5262 : /* FIXME This is a mandatory feature but we don't support it yet */
5263 0 : FD_DTRACE_PROBE_1( quic_handle_retire_conn_id_frame, context->conn->our_conn_id );
5264 0 : (void)data;
5265 0 : FD_DEBUG( FD_LOG_DEBUG(( "retire_conn_id requested" )); )
5266 0 : return 0;
5267 0 : }
5268 :
5269 : static ulong
5270 : fd_quic_handle_path_challenge_frame(
5271 : fd_quic_frame_ctx_t * context,
5272 : fd_quic_path_challenge_frame_t * data,
5273 : uchar const * p FD_PARAM_UNUSED,
5274 0 : ulong p_sz FD_PARAM_UNUSED ) {
5275 : /* FIXME The recipient of this frame MUST generate a PATH_RESPONSE frame (Section 19.18) containing the same Data value. */
5276 0 : FD_DTRACE_PROBE_1( quic_handle_path_challenge_frame, context->conn->our_conn_id );
5277 0 : (void)data;
5278 0 : return 0UL;
5279 0 : }
5280 :
5281 : static ulong
5282 : fd_quic_handle_path_response_frame(
5283 : fd_quic_frame_ctx_t * context,
5284 : fd_quic_path_response_frame_t * data,
5285 : uchar const * p FD_PARAM_UNUSED,
5286 0 : ulong p_sz FD_PARAM_UNUSED ) {
5287 : /* We don't generate PATH_CHALLENGE frames, so this frame should never arrive */
5288 0 : FD_DTRACE_PROBE_1( quic_handle_path_response_frame, context->conn->our_conn_id );
5289 0 : (void)data;
5290 0 : return 0UL;
5291 0 : }
5292 :
5293 : static void
5294 6012 : fd_quic_handle_conn_close_frame( fd_quic_conn_t * conn ) {
5295 : /* frame type 0x1c means no error, or only error at quic level
5296 : frame type 0x1d means error at application layer
5297 : TODO provide APP with this info */
5298 6012 : FD_DEBUG( FD_LOG_DEBUG(( "peer requested close" )) );
5299 :
5300 6012 : switch( conn->state ) {
5301 0 : case FD_QUIC_CONN_STATE_PEER_CLOSE:
5302 0 : case FD_QUIC_CONN_STATE_ABORT:
5303 9 : case FD_QUIC_CONN_STATE_CLOSE_PENDING:
5304 9 : return;
5305 :
5306 6003 : default:
5307 6003 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_PEER_CLOSE );
5308 6012 : }
5309 :
5310 6003 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
5311 6003 : fd_quic_svc_prep_schedule_now( conn );
5312 6003 : }
5313 :
5314 : static ulong
5315 : fd_quic_handle_conn_close_0_frame(
5316 : fd_quic_frame_ctx_t * context,
5317 : fd_quic_conn_close_0_frame_t * data,
5318 : uchar const * p,
5319 0 : ulong p_sz ) {
5320 0 : (void)p;
5321 :
5322 0 : ulong reason_phrase_length = data->reason_phrase_length;
5323 0 : if( FD_UNLIKELY( reason_phrase_length > p_sz ) ) {
5324 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
5325 0 : return FD_QUIC_PARSE_FAIL;
5326 0 : }
5327 :
5328 : /* the information here can be invaluable for debugging */
5329 0 : FD_DEBUG(
5330 0 : char reason_buf[256] = {0};
5331 0 : ulong reason_len = fd_ulong_min( sizeof(reason_buf)-1, reason_phrase_length );
5332 0 : memcpy( reason_buf, p, reason_len );
5333 :
5334 0 : FD_LOG_WARNING(( "fd_quic_handle_conn_close_frame - "
5335 0 : "error_code: %lu "
5336 0 : "frame_type: %lx "
5337 0 : "reason: %s",
5338 0 : data->error_code,
5339 0 : data->frame_type,
5340 0 : reason_buf ));
5341 0 : );
5342 :
5343 0 : fd_quic_handle_conn_close_frame( context->conn );
5344 :
5345 0 : return reason_phrase_length;
5346 0 : }
5347 :
5348 : static ulong
5349 : fd_quic_handle_conn_close_1_frame(
5350 : fd_quic_frame_ctx_t * context,
5351 : fd_quic_conn_close_1_frame_t * data,
5352 : uchar const * p,
5353 6012 : ulong p_sz ) {
5354 6012 : (void)p;
5355 :
5356 6012 : ulong reason_phrase_length = data->reason_phrase_length;
5357 6012 : if( FD_UNLIKELY( reason_phrase_length > p_sz ) ) {
5358 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
5359 0 : return FD_QUIC_PARSE_FAIL;
5360 0 : }
5361 :
5362 : /* the information here can be invaluable for debugging */
5363 6012 : FD_DEBUG(
5364 6012 : char reason_buf[256] = {0};
5365 6012 : ulong reason_len = fd_ulong_min( sizeof(reason_buf)-1, reason_phrase_length );
5366 6012 : memcpy( reason_buf, p, reason_len );
5367 :
5368 6012 : FD_LOG_WARNING(( "fd_quic_handle_conn_close_frame - "
5369 6012 : "error_code: %lu "
5370 6012 : "reason: %s",
5371 6012 : data->error_code,
5372 6012 : reason_buf ));
5373 6012 : );
5374 :
5375 6012 : fd_quic_handle_conn_close_frame( context->conn );
5376 :
5377 6012 : return reason_phrase_length;
5378 6012 : }
5379 :
5380 : static ulong
5381 : fd_quic_handle_handshake_done_frame(
5382 : fd_quic_frame_ctx_t * context,
5383 : fd_quic_handshake_done_frame_t * data,
5384 : uchar const * p FD_PARAM_UNUSED,
5385 6060 : ulong p_sz FD_PARAM_UNUSED ) {
5386 6060 : fd_quic_conn_t * conn = context->conn;
5387 6060 : (void)data;
5388 :
5389 : /* servers must treat receipt of HANDSHAKE_DONE as a protocol violation */
5390 6060 : if( FD_UNLIKELY( conn->server ) ) {
5391 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
5392 0 : return FD_QUIC_PARSE_FAIL;
5393 0 : }
5394 :
5395 6060 : if( conn->state == FD_QUIC_CONN_STATE_HANDSHAKE ) {
5396 : /* still handshaking... assume packet was reordered */
5397 0 : context->pkt->ack_flag |= ACK_FLAG_CANCEL;
5398 0 : return 0UL;
5399 6060 : } else if( conn->state != FD_QUIC_CONN_STATE_HANDSHAKE_COMPLETE ) {
5400 : /* duplicate frame or conn closing? */
5401 0 : return 0UL;
5402 0 : }
5403 :
5404 : /* Instantly acknowledge the first HANDSHAKE_DONE frame */
5405 6060 : fd_quic_svc_prep_schedule_now( conn );
5406 :
5407 : /* RFC 9001 4.9.2. Discarding Handshake Keys
5408 : > An endpoint MUST discard its Handshake keys when the
5409 : > TLS handshake is confirmed
5410 : RFC 9001 4.1.2. Handshake Confirmed
5411 : > At the client, the handshake is considered confirmed when a
5412 : > HANDSHAKE_DONE frame is received. */
5413 6060 : fd_quic_abandon_enc_level( conn, fd_quic_enc_level_handshake_id );
5414 :
5415 6060 : if( FD_UNLIKELY( !conn->tls_hs ) ) {
5416 : /* sanity check */
5417 0 : return 0;
5418 0 : }
5419 :
5420 : /* eliminate any remaining hs_data at application level */
5421 6060 : fd_quic_tls_clear_hs_data( conn->tls_hs, fd_quic_enc_level_appdata_id );
5422 :
5423 : /* we shouldn't be receiving this unless handshake is complete */
5424 6060 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_ACTIVE );
5425 :
5426 : /* user callback */
5427 6060 : fd_quic_cb_conn_hs_complete( conn->quic, conn );
5428 :
5429 : /* Deallocate tls_hs once completed */
5430 6060 : if( FD_LIKELY( conn->tls_hs ) ) {
5431 6060 : fd_quic_state_t * state = fd_quic_get_state( conn->quic );
5432 6060 : fd_quic_tls_hs_delete( conn->tls_hs );
5433 6060 : fd_quic_tls_hs_cache_ele_remove( &state->hs_cache, conn->tls_hs, state->hs_pool );
5434 6060 : fd_quic_tls_hs_pool_ele_release( state->hs_pool, conn->tls_hs );
5435 6060 : conn->tls_hs = NULL;
5436 6060 : }
5437 :
5438 6060 : return 0;
5439 6060 : }
5440 :
5441 : /* initiate the shutdown of a connection
5442 : may select a reason code */
5443 : void
5444 : fd_quic_conn_close( fd_quic_conn_t * conn,
5445 6030 : uint app_reason ) {
5446 6030 : if( FD_UNLIKELY( !conn ) ) return;
5447 :
5448 6030 : switch( conn->state ) {
5449 6 : case FD_QUIC_CONN_STATE_INVALID:
5450 6 : case FD_QUIC_CONN_STATE_DEAD:
5451 6 : case FD_QUIC_CONN_STATE_ABORT:
5452 6 : return; /* close has no effect in these states */
5453 :
5454 6024 : default:
5455 6024 : {
5456 6024 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_CLOSE_PENDING );
5457 6024 : conn->app_reason = app_reason;
5458 6024 : }
5459 6030 : }
5460 :
5461 : /* set connection to be serviced ASAP */
5462 6024 : fd_quic_svc_prep_schedule_now( conn );
5463 6024 : fd_quic_svc_schedule1( conn );
5464 6024 : }
5465 :
5466 : void
5467 : fd_quic_conn_let_die( fd_quic_conn_t * conn,
5468 3 : long keep_alive_duration ) {
5469 3 : long const now = fd_quic_get_state( conn->quic )->now;
5470 3 : conn->let_die_time_ns = fd_long_sat_add( now, keep_alive_duration );
5471 3 : }
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