lsquic_parse_common.h revision fb3e20e0
17d09751dSDmitri Tikhonov/* Copyright (c) 2017 - 2020 LiteSpeed Technologies Inc.  See LICENSE. */
29626cfc2SDmitri Tikhonov/*
39626cfc2SDmitri Tikhonov * lsquic_parse_common.h
49626cfc2SDmitri Tikhonov */
59626cfc2SDmitri Tikhonov
69626cfc2SDmitri Tikhonov#ifndef LSQUIC_PARSE_COMMON_H
79626cfc2SDmitri Tikhonov#define LSQUIC_PARSE_COMMON_H 1
89626cfc2SDmitri Tikhonov
9fb3e20e0SDmitri Tikhonov#ifdef WIN32
10fb3e20e0SDmitri Tikhonov#include "vc_compat.h"
11fb3e20e0SDmitri Tikhonov#endif
12fb3e20e0SDmitri Tikhonov
139626cfc2SDmitri Tikhonovstruct lsquic_packet_in;
145392f7a3SLiteSpeed Techstruct packin_parse_state;
159626cfc2SDmitri Tikhonov
169626cfc2SDmitri Tikhonovstruct packin_parse_state {
179626cfc2SDmitri Tikhonov    const unsigned char     *pps_p;      /* Pointer to packet number */
189626cfc2SDmitri Tikhonov    unsigned                 pps_nbytes; /* Number of bytes in packet number */
199626cfc2SDmitri Tikhonov};
209626cfc2SDmitri Tikhonov
219626cfc2SDmitri Tikhonovint
229626cfc2SDmitri Tikhonovlsquic_parse_packet_in_begin (struct lsquic_packet_in *,
235392f7a3SLiteSpeed Tech                size_t length, int is_server, unsigned cid_len,
245392f7a3SLiteSpeed Tech                struct packin_parse_state *);
259626cfc2SDmitri Tikhonov
269626cfc2SDmitri Tikhonovint
275392f7a3SLiteSpeed Techlsquic_parse_packet_in_server_begin (struct lsquic_packet_in *packet_in,
285392f7a3SLiteSpeed Tech                size_t length, int is_server_UNUSED, unsigned cid_len,
295392f7a3SLiteSpeed Tech                struct packin_parse_state *);
305392f7a3SLiteSpeed Tech
315392f7a3SLiteSpeed Techint
325392f7a3SLiteSpeed Techlsquic_ietf_v1_parse_packet_in_begin (struct lsquic_packet_in *,
335392f7a3SLiteSpeed Tech            size_t length, int is_server, unsigned cid_len,
345392f7a3SLiteSpeed Tech            struct packin_parse_state *);
355392f7a3SLiteSpeed Tech
365392f7a3SLiteSpeed Techint
375392f7a3SLiteSpeed Techlsquic_Q046_parse_packet_in_begin (struct lsquic_packet_in *,
385392f7a3SLiteSpeed Tech            size_t length, int is_server, unsigned cid_len,
395392f7a3SLiteSpeed Tech            struct packin_parse_state *);
405392f7a3SLiteSpeed Tech
415392f7a3SLiteSpeed Techint
427a8b2eceSDmitri Tikhonovlsquic_Q050_parse_packet_in_begin (struct lsquic_packet_in *,
435392f7a3SLiteSpeed Tech            size_t length, int is_server, unsigned cid_len,
445392f7a3SLiteSpeed Tech            struct packin_parse_state *);
455392f7a3SLiteSpeed Tech
465392f7a3SLiteSpeed Techint
475392f7a3SLiteSpeed Techlsquic_ietf_v1_parse_packet_in_long_begin (struct lsquic_packet_in *,
485392f7a3SLiteSpeed Tech            size_t length, int is_server, unsigned cid_len,
495392f7a3SLiteSpeed Tech            struct packin_parse_state *);
505392f7a3SLiteSpeed Tech
515392f7a3SLiteSpeed Techint
525392f7a3SLiteSpeed Techlsquic_ietf_v1_parse_packet_in_short_begin (struct lsquic_packet_in *,
535392f7a3SLiteSpeed Tech            size_t length, int is_server, unsigned cid_len,
545392f7a3SLiteSpeed Tech            struct packin_parse_state *);
555392f7a3SLiteSpeed Tech
565392f7a3SLiteSpeed Techstruct sockaddr;
575392f7a3SLiteSpeed Techenum lsquic_version;
585392f7a3SLiteSpeed Techstruct lsquic_engine_public;
595392f7a3SLiteSpeed Tech
605392f7a3SLiteSpeed Techint
615392f7a3SLiteSpeed Techlsquic_gquic_gen_ver_nego_pkt (unsigned char *buf, size_t bufsz,
625392f7a3SLiteSpeed Tech                               const lsquic_cid_t *cid, unsigned versions);
635392f7a3SLiteSpeed Techint
645392f7a3SLiteSpeed Techlsquic_Q046_gen_ver_nego_pkt (unsigned char *buf, size_t bufsz,
65a0e1aeeeSDmitri Tikhonov    const lsquic_cid_t *scid, const lsquic_cid_t *dcid, unsigned versions,
66a0e1aeeeSDmitri Tikhonov    uint8_t);
675392f7a3SLiteSpeed Techint
685392f7a3SLiteSpeed Techlsquic_ietf_v1_gen_ver_nego_pkt (unsigned char *buf, size_t bufsz,
69a0e1aeeeSDmitri Tikhonov    const lsquic_cid_t *scid, const lsquic_cid_t *dcid, unsigned versions,
70a0e1aeeeSDmitri Tikhonov    uint8_t);
715392f7a3SLiteSpeed Techint
725392f7a3SLiteSpeed Techlsquic_iquic_gen_retry_pkt (unsigned char *buf, size_t bufsz,
735392f7a3SLiteSpeed Tech    const struct lsquic_engine_public *, const lsquic_cid_t *scid,
745392f7a3SLiteSpeed Tech    const lsquic_cid_t *dcid, enum lsquic_version, const struct sockaddr *,
755392f7a3SLiteSpeed Tech    uint8_t random_nybble);
765392f7a3SLiteSpeed Tech
775392f7a3SLiteSpeed Tech#define GQUIC_RESET_SZ 33
785392f7a3SLiteSpeed Techssize_t
795392f7a3SLiteSpeed Techlsquic_generate_gquic_reset (const lsquic_cid_t *, unsigned char *buf,
805392f7a3SLiteSpeed Tech                                                            size_t buf_sz);
815392f7a3SLiteSpeed Tech
825392f7a3SLiteSpeed Techint
835392f7a3SLiteSpeed Techlsquic_is_valid_iquic_hs_packet (const unsigned char *buf, size_t buf_sz,
845392f7a3SLiteSpeed Tech                                                    lsquic_ver_tag_t *tag);
855392f7a3SLiteSpeed Tech
865392f7a3SLiteSpeed Techint
877a8b2eceSDmitri Tikhonovlsquic_is_valid_ietf_v1_or_Q046plus_hs_packet (const unsigned char *buf,
885392f7a3SLiteSpeed Tech                                    size_t length, lsquic_ver_tag_t *tagp);
899626cfc2SDmitri Tikhonov
9014e3680dSDmitri Tikhonov/* Instead of just -1 like CHECK_SPACE(), this macro returns the number
9114e3680dSDmitri Tikhonov * of bytes needed.
9214e3680dSDmitri Tikhonov */
9314e3680dSDmitri Tikhonov#define CHECK_STREAM_SPACE(need, pstart, pend) do {                 \
9414e3680dSDmitri Tikhonov    if ((intptr_t) (need) > ((pend) - (pstart))) {                  \
9514e3680dSDmitri Tikhonov        return -((int) (need));                                     \
9614e3680dSDmitri Tikhonov    }                                                               \
9714e3680dSDmitri Tikhonov} while (0)
9814e3680dSDmitri Tikhonov
999626cfc2SDmitri Tikhonov#endif
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