lsquic_parse_Q050.c revision 06b2a236 
1/* Copyright (c) 2017 - 2021 LiteSpeed Technologies Inc.  See LICENSE. */
2/*
3 * lsquic_parse_Q050.c -- Parsing functions specific to GQUIC Q050
4 */
5
6#include <assert.h>
7#include <errno.h>
8#include <inttypes.h>
9#include <string.h>
10#include <sys/queue.h>
11#ifndef WIN32
12#include <sys/types.h>
13#else
14#include <vc_compat.h>
15#endif
16
17#include "lsquic_types.h"
18#include "lsquic_int_types.h"
19#include "lsquic_packet_common.h"
20#include "lsquic_packet_in.h"
21#include "lsquic_packet_out.h"
22#include "lsquic_parse.h"
23#include "lsquic_parse_common.h"
24#include "lsquic_version.h"
25#include "lsquic.h"
26#include "lsquic_parse_gquic_be.h"
27#include "lsquic_parse_ietf.h"
28#include "lsquic_byteswap.h"
29#include "lsquic_hash.h"
30#include "lsquic_conn.h"
31#include "lsquic_varint.h"
32#include "lsquic_enc_sess.h"
33
34#define LSQUIC_LOGGER_MODULE LSQLM_PARSE
35#include "lsquic_logger.h"
36
37
38/* [draft-ietf-quic-transport-24] Section-17.2 */
39static const enum header_type bits2ht[4] =
40{
41    [0] = HETY_INITIAL,
42    [1] = HETY_0RTT,
43    [2] = HETY_HANDSHAKE,
44    [3] = HETY_RETRY,
45};
46
47
48int
49lsquic_Q050_parse_packet_in_long_begin (struct lsquic_packet_in *packet_in,
50                size_t length, int is_server, unsigned cid_len,
51                struct packin_parse_state *state)
52{
53    const unsigned char *p = packet_in->pi_data;
54    const unsigned char *const end = p + length;
55    lsquic_ver_tag_t tag;
56    enum header_type header_type;
57    unsigned dcil, scil, odcil;
58    int verneg, r;
59    unsigned char first_byte;
60    uint64_t payload_len, token_len;
61
62    if (length < 6)
63        return -1;
64    first_byte = *p++;
65
66    memcpy(&tag, p, 4);
67    p += 4;
68    verneg = 0 == tag;
69    if (!verneg)
70        header_type = bits2ht[ (first_byte >> 4) & 3 ];
71    else
72        header_type = HETY_VERNEG;
73
74    packet_in->pi_header_type = header_type;
75
76    dcil = *p++;
77    if (p + dcil >= end || dcil > MAX_CID_LEN)
78        return -1;
79    if (dcil)
80    {
81        memcpy(packet_in->pi_dcid.idbuf, p, dcil);
82        packet_in->pi_flags |= PI_CONN_ID;
83        p += dcil;
84        packet_in->pi_dcid.len = dcil;
85    }
86
87    scil = *p++;
88    if (p + scil > end || scil > MAX_CID_LEN)
89        return -1;
90    if (scil)
91    {
92        memcpy(packet_in->pi_dcid.idbuf, p, scil);
93        packet_in->pi_flags |= PI_CONN_ID;
94        p += scil;
95        packet_in->pi_dcid.len = scil;
96    }
97
98    if (is_server)
99    {
100        if (scil)
101            return -1;
102    }
103    else
104        if (dcil)
105            return -1;
106
107    switch (header_type)
108    {
109    case HETY_INITIAL:
110        r = vint_read(p, end, &token_len);
111        if (r < 0)
112            return -1;
113        if (token_len && !is_server)
114        {
115            /* From [draft-ietf-quic-transport-14]:
116             *
117             *  Token Length:  A variable-length integer specifying the
118             *  length of the Token field, in bytes.  This value is zero
119             *  if no token is present.  Initial packets sent by the
120             *  server MUST set the Token Length field to zero; clients
121             *  that receive an Initial packet with a non-zero Token
122             *  Length field MUST either discard the packet or generate
123             *  a connection error of type PROTOCOL_VIOLATION.
124             */
125            return -1;
126        }
127        p += r;
128        if (token_len)
129        {
130            if (token_len >=
131                        1ull << (sizeof(packet_in->pi_token_size) * 8))
132                return -1;
133            if (p + token_len > end)
134                return -1;
135            packet_in->pi_token = p - packet_in->pi_data;
136            packet_in->pi_token_size = token_len;
137            p += token_len;
138        }
139        /* fall-through */
140    case HETY_HANDSHAKE:
141    case HETY_0RTT:
142        if (p >= end)
143            return -1;
144        r = vint_read(p, end, &payload_len);
145        if (r < 0)
146            return -1;
147        p += r;
148        if (p - packet_in->pi_data + payload_len > length)
149            return -1;
150        length = p - packet_in->pi_data + payload_len;
151        if (end - p < 4)
152            return -1;
153        state->pps_p      = p - r;
154        state->pps_nbytes = r;
155        packet_in->pi_quic_ver = 1;
156        break;
157    case HETY_RETRY:
158        if (p >= end)
159            return -1;
160        odcil = *p++;
161        if (p + odcil > end || odcil > MAX_CID_LEN)
162            return -1;
163        packet_in->pi_odcid_len = odcil;
164        packet_in->pi_odcid = p - packet_in->pi_data;
165        p += odcil;
166        packet_in->pi_token = p - packet_in->pi_data;
167        packet_in->pi_token_size = end - p;
168        p = end;
169        length = end - packet_in->pi_data;
170        state->pps_p      = NULL;
171        state->pps_nbytes = 0;
172        packet_in->pi_quic_ver = 1;
173        break;
174    default:
175        assert(header_type == HETY_VERNEG);
176        if (p >= end || (3 & (uintptr_t) (end - p)))
177            return -1;
178        packet_in->pi_quic_ver = p - packet_in->pi_data;
179        p = end;
180        state->pps_p      = NULL;
181        state->pps_nbytes = 0;
182        break;
183    }
184
185    packet_in->pi_header_sz     = p - packet_in->pi_data;
186    packet_in->pi_data_sz       = length;
187    packet_in->pi_nonce         = 0;
188    packet_in->pi_refcnt        = 0;
189    packet_in->pi_frame_types   = 0;
190    memset(&packet_in->pi_next, 0, sizeof(packet_in->pi_next));
191    packet_in->pi_refcnt        = 0;
192    packet_in->pi_received      = 0;
193
194    /* Packet number is set to an invalid value.  The packet number must
195     * be decrypted, which happens later.
196     */
197    packet_in->pi_packno        = 1ULL << 62;
198
199    return 0;
200}
201
202
203
204
205static unsigned
206gquic_Q050_packno_bits2len (enum packno_bits bits)
207{
208    return bits + 1;
209}
210
211#define iquic_packno_bits2len gquic_Q050_packno_bits2len
212
213
214static enum packno_bits
215gquic_Q050_calc_packno_bits (lsquic_packno_t packno,
216                    lsquic_packno_t least_unacked, uint64_t n_in_flight)
217{
218    uint64_t delta;
219    unsigned bits;
220
221    delta = packno - least_unacked;
222    if (n_in_flight > delta)
223        delta = n_in_flight;
224
225    delta *= 4;
226    bits = (delta >= (1ULL <<  8))
227         + (delta >= (1ULL << 16))
228         + (delta >= (1ULL << 24))
229         ;
230
231    return bits;
232}
233
234
235static unsigned
236write_packno (unsigned char *p, lsquic_packno_t packno, enum packno_bits bits)
237{
238    unsigned char *const begin = p;
239
240    switch (bits)
241    {
242    case IQUIC_PACKNO_LEN_4:
243        *p++ = packno >> 24;
244        /* fall-through */
245    case IQUIC_PACKNO_LEN_3:
246        *p++ = packno >> 16;
247        /* fall-through */
248    case IQUIC_PACKNO_LEN_2:
249        *p++ = packno >> 8;
250        /* fall-through */
251    default:
252        *p++ = packno;
253    }
254
255    return p - begin;
256}
257
258
259static int
260gen_short_pkt_header (const struct lsquic_conn *lconn,
261            const struct lsquic_packet_out *packet_out, unsigned char *buf,
262            size_t bufsz, unsigned *packno_off_p, unsigned *packno_len_p)
263{
264    unsigned packno_len, need;
265    enum packno_bits bits;
266    unsigned char *p = buf;
267
268    bits = lsquic_packet_out_packno_bits(packet_out);
269    packno_len = iquic_packno_bits2len(bits);
270
271    if (lconn->cn_flags & LSCONN_SERVER)
272        need = 1 + packno_len;
273    else
274        need = 1 + 8 /* CID */ + packno_len;
275
276    if (need > bufsz)
277        return -1;
278
279    *p++ = 0x40 | bits;
280
281    if (0 == (lconn->cn_flags & LSCONN_SERVER))
282    {
283        memcpy(p, lconn->cn_cid.idbuf, 8);
284        p += 8;
285    }
286
287    *packno_off_p = p - buf;
288    *packno_len_p = packno_len;
289    (void) write_packno(p, packet_out->po_packno, bits);
290
291    return need;
292}
293
294
295static size_t
296gquic_Q050_packout_header_size_long_by_flags (const struct lsquic_conn *lconn,
297                                                    enum packet_out_flags flags)
298{
299    size_t sz;
300    enum packno_bits packno_bits;
301
302    packno_bits = (flags >> POBIT_SHIFT) & 0x3;
303
304    sz = 1 /* Type */
305       + 4 /* Version */
306       + 1 /* DCIL */
307       + 1 /* SCIL */
308       + lconn->cn_cid.len
309       + 1 /* Token length: only use for Initial packets, while token is never
310            * set in this version.
311            */
312       + (flags & PO_NONCE ? DNONC_LENGTH : 0)
313       + 2 /* Always use two bytes to encode payload length */
314       + iquic_packno_bits2len(packno_bits)
315       ;
316
317    return sz;
318}
319
320
321/* [draft-ietf-quic-transport-17] Section-17.2 */
322static const unsigned char header_type_to_bin[] = {
323    [HETY_INITIAL]      = 0x0,
324    [HETY_0RTT]         = 0x1,
325    [HETY_HANDSHAKE]    = 0x2,
326    [HETY_RETRY]        = 0x3,
327};
328
329
330static size_t
331gquic_Q050_packout_header_size_long_by_packet (const struct lsquic_conn *lconn,
332                                    const struct lsquic_packet_out *packet_out)
333{
334    size_t sz;
335    enum packno_bits packno_bits;
336
337    packno_bits = lsquic_packet_out_packno_bits(packet_out);
338
339    sz = 1 /* Type */
340       + 4 /* Version */
341       + 1 /* DCIL */
342       + 1 /* SCIL */
343       + lconn->cn_cid.len
344         /* Token is never sent, but token length byte is used */
345       + (packet_out->po_header_type == HETY_INITIAL)
346       + 2 /* Always use two bytes to encode payload length */
347       + iquic_packno_bits2len(packno_bits)
348       + (packet_out->po_nonce ? DNONC_LENGTH : 0)
349       ;
350
351    return sz;
352}
353
354
355static int
356gquic_Q050_gen_long_pkt_header (const struct lsquic_conn *lconn,
357            const struct lsquic_packet_out *packet_out, unsigned char *buf,
358            size_t bufsz, unsigned *packno_off_p, unsigned *packno_len_p)
359{
360    enum packno_bits packno_bits;
361    lsquic_ver_tag_t ver_tag;
362    unsigned token_len, payload_len, bits;
363    unsigned char *p;
364    size_t need;
365
366    need = gquic_Q050_packout_header_size_long_by_packet(lconn, packet_out);
367    if (need > bufsz)
368    {
369        errno = EINVAL;
370        return -1;
371    }
372
373    packno_bits = lsquic_packet_out_packno_bits(packet_out);
374    p = buf;
375    *p++ = 0x80 | 0x40
376         | (header_type_to_bin[ packet_out->po_header_type ] << 4)
377         | packno_bits;
378    ver_tag = lsquic_ver2tag(lconn->cn_version);
379    memcpy(p, &ver_tag, sizeof(ver_tag));
380    p += sizeof(ver_tag);
381
382    if (lconn->cn_flags & LSCONN_SERVER)
383    {
384        *p++ = 0;
385        *p++ = lconn->cn_cid.len;
386        memcpy(p, lconn->cn_cid.idbuf, lconn->cn_cid.len);
387        p += lconn->cn_cid.len;
388    }
389    else
390    {
391        *p++ = lconn->cn_cid.len;
392        memcpy(p, lconn->cn_cid.idbuf, lconn->cn_cid.len);
393        p += lconn->cn_cid.len;
394        *p++ = 0;
395    }
396
397    if (HETY_INITIAL == packet_out->po_header_type)
398    {
399        token_len = packet_out->po_token_len;
400        bits = vint_val2bits(token_len);
401        vint_write(p, token_len, bits, 1 << bits);
402        p += 1 << bits;
403        memcpy(p, packet_out->po_token, token_len);
404        p += token_len;
405    }
406
407    payload_len = packet_out->po_data_sz
408                + lconn->cn_esf_c->esf_tag_len
409                + iquic_packno_bits2len(packno_bits);
410    if (packet_out->po_nonce)
411        payload_len += DNONC_LENGTH;
412    bits = 1;   /* Always use two bytes to encode payload length */
413    vint_write(p, payload_len, bits, 1 << bits);
414    p += 1 << bits;
415    *packno_off_p = p - buf;
416    *packno_len_p = iquic_packno_bits2len(packno_bits);
417    p += write_packno(p, packet_out->po_packno, packno_bits);
418
419    if (packet_out->po_nonce)
420    {
421        memcpy(p, packet_out->po_nonce, DNONC_LENGTH);
422        p += DNONC_LENGTH;
423    }
424
425    assert(need == (size_t) (p - buf));
426    return p - buf;
427}
428
429
430static int
431gquic_Q050_gen_reg_pkt_header (const struct lsquic_conn *lconn,
432            const struct lsquic_packet_out *packet_out, unsigned char *buf,
433            size_t bufsz, unsigned *packno_off, unsigned *packno_len)
434{
435    if (0 == (packet_out->po_flags & PO_LONGHEAD))
436        return gen_short_pkt_header(lconn, packet_out, buf, bufsz,
437                                                        packno_off, packno_len);
438    else
439        return gquic_Q050_gen_long_pkt_header(lconn, packet_out, buf, bufsz,
440                                                        packno_off, packno_len);
441}
442
443
444static size_t
445gquic_Q050_packout_header_size_short (const struct lsquic_conn *lconn,
446                                                enum packet_out_flags flags)
447{
448    enum packno_bits bits;
449    size_t sz;
450
451    bits = (flags >> POBIT_SHIFT) & 0x3;
452    sz = 1; /* Type */
453    sz += (lconn->cn_flags & LSCONN_SERVER) ? 0 : 8;
454    sz += iquic_packno_bits2len(bits);
455
456    return sz;
457}
458
459
460static size_t
461gquic_Q050_packout_max_header_size (const struct lsquic_conn *lconn,
462                        enum packet_out_flags flags, size_t dcid_len_unused,
463                        enum header_type unused)
464{
465    if (lconn->cn_flags & LSCONN_SERVER)
466    {
467        if (0 == (flags & PO_LONGHEAD))
468            return gquic_Q050_packout_header_size_short(lconn, flags);
469        else
470            return gquic_Q050_packout_header_size_long_by_flags(lconn, flags);
471    }
472    else
473    {
474        if (lconn->cn_flags & LSCONN_HANDSHAKE_DONE)
475            return gquic_Q050_packout_header_size_short(lconn, flags);
476        else
477            return gquic_Q050_packout_header_size_long_by_flags(lconn, flags);
478    }
479}
480
481
482static size_t
483gquic_Q050_packout_size (const struct lsquic_conn *lconn,
484                                const struct lsquic_packet_out *packet_out)
485{
486    size_t sz;
487
488    if ((lconn->cn_flags & LSCONN_HANDSHAKE_DONE)
489                                && packet_out->po_header_type == HETY_NOT_SET)
490        sz = gquic_Q050_packout_header_size_short(lconn, packet_out->po_flags);
491    else
492        sz = gquic_Q050_packout_header_size_long_by_packet(lconn, packet_out);
493
494    sz += packet_out->po_data_sz;
495    sz += lconn->cn_esf_c->esf_tag_len;
496
497    return sz;
498}
499
500
501static void
502gquic_Q050_parse_packet_in_finish (struct lsquic_packet_in *packet_in,
503                                            struct packin_parse_state *state)
504{
505}
506
507
508/* Same as Q046 plus CRYPTO frame at slot 8 */
509static const enum quic_frame_type byte2frame_type_Q050[0x100] =
510{
511    [0x00] = QUIC_FRAME_PADDING,
512    [0x01] = QUIC_FRAME_RST_STREAM,
513    [0x02] = QUIC_FRAME_CONNECTION_CLOSE,
514    [0x03] = QUIC_FRAME_GOAWAY,
515    [0x04] = QUIC_FRAME_WINDOW_UPDATE,
516    [0x05] = QUIC_FRAME_BLOCKED,
517    [0x06] = QUIC_FRAME_STOP_WAITING,
518    [0x07] = QUIC_FRAME_PING,
519    [0x08] = QUIC_FRAME_CRYPTO,
520    [0x09] = QUIC_FRAME_INVALID,
521    [0x0A] = QUIC_FRAME_INVALID,
522    [0x0B] = QUIC_FRAME_INVALID,
523    [0x0C] = QUIC_FRAME_INVALID,
524    [0x0D] = QUIC_FRAME_INVALID,
525    [0x0E] = QUIC_FRAME_INVALID,
526    [0x0F] = QUIC_FRAME_INVALID,
527    [0x10] = QUIC_FRAME_INVALID,
528    [0x11] = QUIC_FRAME_INVALID,
529    [0x12] = QUIC_FRAME_INVALID,
530    [0x13] = QUIC_FRAME_INVALID,
531    [0x14] = QUIC_FRAME_INVALID,
532    [0x15] = QUIC_FRAME_INVALID,
533    [0x16] = QUIC_FRAME_INVALID,
534    [0x17] = QUIC_FRAME_INVALID,
535    [0x18] = QUIC_FRAME_INVALID,
536    [0x19] = QUIC_FRAME_INVALID,
537    [0x1A] = QUIC_FRAME_INVALID,
538    [0x1B] = QUIC_FRAME_INVALID,
539    [0x1C] = QUIC_FRAME_INVALID,
540    [0x1D] = QUIC_FRAME_INVALID,
541    [0x1E] = QUIC_FRAME_INVALID,
542    [0x1F] = QUIC_FRAME_INVALID,
543    [0x20] = QUIC_FRAME_INVALID,
544    [0x21] = QUIC_FRAME_INVALID,
545    [0x22] = QUIC_FRAME_INVALID,
546    [0x23] = QUIC_FRAME_INVALID,
547    [0x24] = QUIC_FRAME_INVALID,
548    [0x25] = QUIC_FRAME_INVALID,
549    [0x26] = QUIC_FRAME_INVALID,
550    [0x27] = QUIC_FRAME_INVALID,
551    [0x28] = QUIC_FRAME_INVALID,
552    [0x29] = QUIC_FRAME_INVALID,
553    [0x2A] = QUIC_FRAME_INVALID,
554    [0x2B] = QUIC_FRAME_INVALID,
555    [0x2C] = QUIC_FRAME_INVALID,
556    [0x2D] = QUIC_FRAME_INVALID,
557    [0x2E] = QUIC_FRAME_INVALID,
558    [0x2F] = QUIC_FRAME_INVALID,
559    [0x30] = QUIC_FRAME_INVALID,
560    [0x31] = QUIC_FRAME_INVALID,
561    [0x32] = QUIC_FRAME_INVALID,
562    [0x33] = QUIC_FRAME_INVALID,
563    [0x34] = QUIC_FRAME_INVALID,
564    [0x35] = QUIC_FRAME_INVALID,
565    [0x36] = QUIC_FRAME_INVALID,
566    [0x37] = QUIC_FRAME_INVALID,
567    [0x38] = QUIC_FRAME_INVALID,
568    [0x39] = QUIC_FRAME_INVALID,
569    [0x3A] = QUIC_FRAME_INVALID,
570    [0x3B] = QUIC_FRAME_INVALID,
571    [0x3C] = QUIC_FRAME_INVALID,
572    [0x3D] = QUIC_FRAME_INVALID,
573    [0x3E] = QUIC_FRAME_INVALID,
574    [0x3F] = QUIC_FRAME_INVALID,
575    [0x40] = QUIC_FRAME_ACK,
576    [0x41] = QUIC_FRAME_ACK,
577    [0x42] = QUIC_FRAME_ACK,
578    [0x43] = QUIC_FRAME_ACK,
579    [0x44] = QUIC_FRAME_ACK,
580    [0x45] = QUIC_FRAME_ACK,
581    [0x46] = QUIC_FRAME_ACK,
582    [0x47] = QUIC_FRAME_ACK,
583    [0x48] = QUIC_FRAME_ACK,
584    [0x49] = QUIC_FRAME_ACK,
585    [0x4A] = QUIC_FRAME_ACK,
586    [0x4B] = QUIC_FRAME_ACK,
587    [0x4C] = QUIC_FRAME_ACK,
588    [0x4D] = QUIC_FRAME_ACK,
589    [0x4E] = QUIC_FRAME_ACK,
590    [0x4F] = QUIC_FRAME_ACK,
591    [0x50] = QUIC_FRAME_ACK,
592    [0x51] = QUIC_FRAME_ACK,
593    [0x52] = QUIC_FRAME_ACK,
594    [0x53] = QUIC_FRAME_ACK,
595    [0x54] = QUIC_FRAME_ACK,
596    [0x55] = QUIC_FRAME_ACK,
597    [0x56] = QUIC_FRAME_ACK,
598    [0x57] = QUIC_FRAME_ACK,
599    [0x58] = QUIC_FRAME_ACK,
600    [0x59] = QUIC_FRAME_ACK,
601    [0x5A] = QUIC_FRAME_ACK,
602    [0x5B] = QUIC_FRAME_ACK,
603    [0x5C] = QUIC_FRAME_ACK,
604    [0x5D] = QUIC_FRAME_ACK,
605    [0x5E] = QUIC_FRAME_ACK,
606    [0x5F] = QUIC_FRAME_ACK,
607    [0x60] = QUIC_FRAME_ACK,
608    [0x61] = QUIC_FRAME_ACK,
609    [0x62] = QUIC_FRAME_ACK,
610    [0x63] = QUIC_FRAME_ACK,
611    [0x64] = QUIC_FRAME_ACK,
612    [0x65] = QUIC_FRAME_ACK,
613    [0x66] = QUIC_FRAME_ACK,
614    [0x67] = QUIC_FRAME_ACK,
615    [0x68] = QUIC_FRAME_ACK,
616    [0x69] = QUIC_FRAME_ACK,
617    [0x6A] = QUIC_FRAME_ACK,
618    [0x6B] = QUIC_FRAME_ACK,
619    [0x6C] = QUIC_FRAME_ACK,
620    [0x6D] = QUIC_FRAME_ACK,
621    [0x6E] = QUIC_FRAME_ACK,
622    [0x6F] = QUIC_FRAME_ACK,
623    [0x70] = QUIC_FRAME_ACK,
624    [0x71] = QUIC_FRAME_ACK,
625    [0x72] = QUIC_FRAME_ACK,
626    [0x73] = QUIC_FRAME_ACK,
627    [0x74] = QUIC_FRAME_ACK,
628    [0x75] = QUIC_FRAME_ACK,
629    [0x76] = QUIC_FRAME_ACK,
630    [0x77] = QUIC_FRAME_ACK,
631    [0x78] = QUIC_FRAME_ACK,
632    [0x79] = QUIC_FRAME_ACK,
633    [0x7A] = QUIC_FRAME_ACK,
634    [0x7B] = QUIC_FRAME_ACK,
635    [0x7C] = QUIC_FRAME_ACK,
636    [0x7D] = QUIC_FRAME_ACK,
637    [0x7E] = QUIC_FRAME_ACK,
638    [0x7F] = QUIC_FRAME_ACK,
639    [0x80] = QUIC_FRAME_STREAM,
640    [0x81] = QUIC_FRAME_STREAM,
641    [0x82] = QUIC_FRAME_STREAM,
642    [0x83] = QUIC_FRAME_STREAM,
643    [0x84] = QUIC_FRAME_STREAM,
644    [0x85] = QUIC_FRAME_STREAM,
645    [0x86] = QUIC_FRAME_STREAM,
646    [0x87] = QUIC_FRAME_STREAM,
647    [0x88] = QUIC_FRAME_STREAM,
648    [0x89] = QUIC_FRAME_STREAM,
649    [0x8A] = QUIC_FRAME_STREAM,
650    [0x8B] = QUIC_FRAME_STREAM,
651    [0x8C] = QUIC_FRAME_STREAM,
652    [0x8D] = QUIC_FRAME_STREAM,
653    [0x8E] = QUIC_FRAME_STREAM,
654    [0x8F] = QUIC_FRAME_STREAM,
655    [0x90] = QUIC_FRAME_STREAM,
656    [0x91] = QUIC_FRAME_STREAM,
657    [0x92] = QUIC_FRAME_STREAM,
658    [0x93] = QUIC_FRAME_STREAM,
659    [0x94] = QUIC_FRAME_STREAM,
660    [0x95] = QUIC_FRAME_STREAM,
661    [0x96] = QUIC_FRAME_STREAM,
662    [0x97] = QUIC_FRAME_STREAM,
663    [0x98] = QUIC_FRAME_STREAM,
664    [0x99] = QUIC_FRAME_STREAM,
665    [0x9A] = QUIC_FRAME_STREAM,
666    [0x9B] = QUIC_FRAME_STREAM,
667    [0x9C] = QUIC_FRAME_STREAM,
668    [0x9D] = QUIC_FRAME_STREAM,
669    [0x9E] = QUIC_FRAME_STREAM,
670    [0x9F] = QUIC_FRAME_STREAM,
671    [0xA0] = QUIC_FRAME_STREAM,
672    [0xA1] = QUIC_FRAME_STREAM,
673    [0xA2] = QUIC_FRAME_STREAM,
674    [0xA3] = QUIC_FRAME_STREAM,
675    [0xA4] = QUIC_FRAME_STREAM,
676    [0xA5] = QUIC_FRAME_STREAM,
677    [0xA6] = QUIC_FRAME_STREAM,
678    [0xA7] = QUIC_FRAME_STREAM,
679    [0xA8] = QUIC_FRAME_STREAM,
680    [0xA9] = QUIC_FRAME_STREAM,
681    [0xAA] = QUIC_FRAME_STREAM,
682    [0xAB] = QUIC_FRAME_STREAM,
683    [0xAC] = QUIC_FRAME_STREAM,
684    [0xAD] = QUIC_FRAME_STREAM,
685    [0xAE] = QUIC_FRAME_STREAM,
686    [0xAF] = QUIC_FRAME_STREAM,
687    [0xB0] = QUIC_FRAME_STREAM,
688    [0xB1] = QUIC_FRAME_STREAM,
689    [0xB2] = QUIC_FRAME_STREAM,
690    [0xB3] = QUIC_FRAME_STREAM,
691    [0xB4] = QUIC_FRAME_STREAM,
692    [0xB5] = QUIC_FRAME_STREAM,
693    [0xB6] = QUIC_FRAME_STREAM,
694    [0xB7] = QUIC_FRAME_STREAM,
695    [0xB8] = QUIC_FRAME_STREAM,
696    [0xB9] = QUIC_FRAME_STREAM,
697    [0xBA] = QUIC_FRAME_STREAM,
698    [0xBB] = QUIC_FRAME_STREAM,
699    [0xBC] = QUIC_FRAME_STREAM,
700    [0xBD] = QUIC_FRAME_STREAM,
701    [0xBE] = QUIC_FRAME_STREAM,
702    [0xBF] = QUIC_FRAME_STREAM,
703    [0xC0] = QUIC_FRAME_STREAM,
704    [0xC1] = QUIC_FRAME_STREAM,
705    [0xC2] = QUIC_FRAME_STREAM,
706    [0xC3] = QUIC_FRAME_STREAM,
707    [0xC4] = QUIC_FRAME_STREAM,
708    [0xC5] = QUIC_FRAME_STREAM,
709    [0xC6] = QUIC_FRAME_STREAM,
710    [0xC7] = QUIC_FRAME_STREAM,
711    [0xC8] = QUIC_FRAME_STREAM,
712    [0xC9] = QUIC_FRAME_STREAM,
713    [0xCA] = QUIC_FRAME_STREAM,
714    [0xCB] = QUIC_FRAME_STREAM,
715    [0xCC] = QUIC_FRAME_STREAM,
716    [0xCD] = QUIC_FRAME_STREAM,
717    [0xCE] = QUIC_FRAME_STREAM,
718    [0xCF] = QUIC_FRAME_STREAM,
719    [0xD0] = QUIC_FRAME_STREAM,
720    [0xD1] = QUIC_FRAME_STREAM,
721    [0xD2] = QUIC_FRAME_STREAM,
722    [0xD3] = QUIC_FRAME_STREAM,
723    [0xD4] = QUIC_FRAME_STREAM,
724    [0xD5] = QUIC_FRAME_STREAM,
725    [0xD6] = QUIC_FRAME_STREAM,
726    [0xD7] = QUIC_FRAME_STREAM,
727    [0xD8] = QUIC_FRAME_STREAM,
728    [0xD9] = QUIC_FRAME_STREAM,
729    [0xDA] = QUIC_FRAME_STREAM,
730    [0xDB] = QUIC_FRAME_STREAM,
731    [0xDC] = QUIC_FRAME_STREAM,
732    [0xDD] = QUIC_FRAME_STREAM,
733    [0xDE] = QUIC_FRAME_STREAM,
734    [0xDF] = QUIC_FRAME_STREAM,
735    [0xE0] = QUIC_FRAME_STREAM,
736    [0xE1] = QUIC_FRAME_STREAM,
737    [0xE2] = QUIC_FRAME_STREAM,
738    [0xE3] = QUIC_FRAME_STREAM,
739    [0xE4] = QUIC_FRAME_STREAM,
740    [0xE5] = QUIC_FRAME_STREAM,
741    [0xE6] = QUIC_FRAME_STREAM,
742    [0xE7] = QUIC_FRAME_STREAM,
743    [0xE8] = QUIC_FRAME_STREAM,
744    [0xE9] = QUIC_FRAME_STREAM,
745    [0xEA] = QUIC_FRAME_STREAM,
746    [0xEB] = QUIC_FRAME_STREAM,
747    [0xEC] = QUIC_FRAME_STREAM,
748    [0xED] = QUIC_FRAME_STREAM,
749    [0xEE] = QUIC_FRAME_STREAM,
750    [0xEF] = QUIC_FRAME_STREAM,
751    [0xF0] = QUIC_FRAME_STREAM,
752    [0xF1] = QUIC_FRAME_STREAM,
753    [0xF2] = QUIC_FRAME_STREAM,
754    [0xF3] = QUIC_FRAME_STREAM,
755    [0xF4] = QUIC_FRAME_STREAM,
756    [0xF5] = QUIC_FRAME_STREAM,
757    [0xF6] = QUIC_FRAME_STREAM,
758    [0xF7] = QUIC_FRAME_STREAM,
759    [0xF8] = QUIC_FRAME_STREAM,
760    [0xF9] = QUIC_FRAME_STREAM,
761    [0xFA] = QUIC_FRAME_STREAM,
762    [0xFB] = QUIC_FRAME_STREAM,
763    [0xFC] = QUIC_FRAME_STREAM,
764    [0xFD] = QUIC_FRAME_STREAM,
765    [0xFE] = QUIC_FRAME_STREAM,
766    [0xFF] = QUIC_FRAME_STREAM,
767};
768
769
770static enum quic_frame_type
771gquic_Q050_parse_frame_type (const unsigned char *buf, size_t len)
772{
773    if (len > 0)
774        return byte2frame_type_Q050[buf[0]];
775    else
776        return QUIC_FRAME_INVALID;
777}
778
779
780static int
781gquic_Q050_gen_crypto_frame (unsigned char *buf, size_t buf_len,
782        lsquic_stream_id_t stream_id, uint64_t offset, int fin,
783        size_t size, gsf_read_f gsf_read, void *stream)
784{
785    return lsquic_ietf_v1_gen_crypto_frame(buf, 0x8, buf_len, stream_id,
786                                        offset, fin, size, gsf_read, stream);
787}
788
789
790static int
791gquic_Q050_parse_crypto_frame (const unsigned char *buf, size_t rem_packet_sz,
792                                            struct stream_frame *stream_frame)
793{
794    if (rem_packet_sz > 0)
795    {
796        assert(0x08 == buf[0]);
797        return lsquic_ietf_v1_parse_crypto_frame(buf, rem_packet_sz,
798                                                            stream_frame);
799    }
800    else
801        return -1;
802}
803
804
805static size_t
806gquic_Q050_calc_crypto_frame_header_sz (uint64_t offset, unsigned data_sz)
807{
808    return 1    /* Frame type */
809         + (1 << vint_val2bits(offset))
810         + (1 << vint_val2bits(data_sz))
811         ;
812}
813
814
815/* No simple PRST for Q050 */
816static ssize_t
817gquic_Q050_generate_simple_prst (const lsquic_cid_t *cidp, unsigned char *buf,
818                                                                size_t buf_sz)
819{
820    return -1;
821}
822
823
824static unsigned
825gquic_Q050_handshake_done_frame_size (void)
826{
827    return 0;
828}
829
830
831static int
832gquic_Q050_gen_handshake_done_frame (unsigned char *buf, size_t buf_len)
833{
834    return -1;
835}
836
837
838static int
839gquic_Q050_parse_handshake_done_frame (const unsigned char *buf, size_t buf_len)
840{
841    return -1;
842}
843
844
845const struct parse_funcs lsquic_parse_funcs_gquic_Q050 =
846{
847    .pf_gen_reg_pkt_header            =  gquic_Q050_gen_reg_pkt_header,
848    .pf_parse_packet_in_finish        =  gquic_Q050_parse_packet_in_finish,
849    .pf_gen_stream_frame              =  lsquic_gquic_be_gen_stream_frame,
850    .pf_calc_stream_frame_header_sz   =  lsquic_calc_stream_frame_header_sz_gquic,
851    .pf_parse_stream_frame            =  lsquic_gquic_be_parse_stream_frame,
852    .pf_dec_stream_frame_size         =  lsquic_gquic_be_dec_stream_frame_size,
853    .pf_parse_ack_frame               =  lsquic_gquic_be_parse_ack_frame,
854    .pf_gen_ack_frame                 =  lsquic_gquic_be_gen_ack_frame,
855    .pf_gen_stop_waiting_frame        =  lsquic_gquic_be_gen_stop_waiting_frame,
856    .pf_parse_stop_waiting_frame      =  lsquic_gquic_be_parse_stop_waiting_frame,
857    .pf_skip_stop_waiting_frame       =  lsquic_gquic_be_skip_stop_waiting_frame,
858    .pf_gen_window_update_frame       =  lsquic_gquic_be_gen_window_update_frame,
859    .pf_parse_window_update_frame     =  lsquic_gquic_be_parse_window_update_frame,
860    .pf_gen_blocked_frame             =  lsquic_gquic_be_gen_blocked_frame,
861    .pf_parse_blocked_frame           =  lsquic_gquic_be_parse_blocked_frame,
862    .pf_gen_rst_frame                 =  lsquic_gquic_be_gen_rst_frame,
863    .pf_parse_rst_frame               =  lsquic_gquic_be_parse_rst_frame,
864    .pf_connect_close_frame_size      =  lsquic_gquic_be_connect_close_frame_size,
865    .pf_gen_connect_close_frame       =  lsquic_gquic_be_gen_connect_close_frame,
866    .pf_parse_connect_close_frame     =  lsquic_gquic_be_parse_connect_close_frame,
867    .pf_gen_goaway_frame              =  lsquic_gquic_be_gen_goaway_frame,
868    .pf_parse_goaway_frame            =  lsquic_gquic_be_parse_goaway_frame,
869    .pf_gen_ping_frame                =  lsquic_gquic_be_gen_ping_frame,
870#ifndef NDEBUG
871    .pf_write_float_time16            =  lsquic_gquic_be_write_float_time16,
872    .pf_read_float_time16             =  lsquic_gquic_be_read_float_time16,
873#endif
874    .pf_generate_simple_prst          =  gquic_Q050_generate_simple_prst,
875    .pf_parse_frame_type              =  gquic_Q050_parse_frame_type,
876    .pf_turn_on_fin                   =  lsquic_turn_on_fin_Q035_thru_Q046,
877    .pf_packout_size                  =  gquic_Q050_packout_size,
878    .pf_packout_max_header_size       =  gquic_Q050_packout_max_header_size,
879    .pf_calc_packno_bits              =  gquic_Q050_calc_packno_bits,
880    .pf_packno_bits2len               =  gquic_Q050_packno_bits2len,
881    .pf_gen_crypto_frame              =  gquic_Q050_gen_crypto_frame,
882    .pf_parse_crypto_frame            =  gquic_Q050_parse_crypto_frame,
883    .pf_calc_crypto_frame_header_sz   =  gquic_Q050_calc_crypto_frame_header_sz,
884    .pf_gen_handshake_done_frame      =  gquic_Q050_gen_handshake_done_frame,
885    .pf_parse_handshake_done_frame    =  gquic_Q050_parse_handshake_done_frame,
886    .pf_handshake_done_frame_size     =  gquic_Q050_handshake_done_frame_size,
887};
888