lsquic_parse_common.h revision 5392f7a3
1229fce07SDmitri Tikhonov/* Copyright (c) 2017 - 2019 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
99626cfc2SDmitri Tikhonovstruct lsquic_packet_in;
105392f7a3SLiteSpeed Techstruct packin_parse_state;
119626cfc2SDmitri Tikhonov
129626cfc2SDmitri Tikhonovstruct packin_parse_state {
139626cfc2SDmitri Tikhonov    const unsigned char     *pps_p;      /* Pointer to packet number */
149626cfc2SDmitri Tikhonov    unsigned                 pps_nbytes; /* Number of bytes in packet number */
159626cfc2SDmitri Tikhonov};
169626cfc2SDmitri Tikhonov
179626cfc2SDmitri Tikhonovint
189626cfc2SDmitri Tikhonovlsquic_parse_packet_in_begin (struct lsquic_packet_in *,
195392f7a3SLiteSpeed Tech                size_t length, int is_server, unsigned cid_len,
205392f7a3SLiteSpeed Tech                struct packin_parse_state *);
219626cfc2SDmitri Tikhonov
229626cfc2SDmitri Tikhonovint
235392f7a3SLiteSpeed Techlsquic_parse_packet_in_server_begin (struct lsquic_packet_in *packet_in,
245392f7a3SLiteSpeed Tech                size_t length, int is_server_UNUSED, unsigned cid_len,
255392f7a3SLiteSpeed Tech                struct packin_parse_state *);
265392f7a3SLiteSpeed Tech
275392f7a3SLiteSpeed Techint
285392f7a3SLiteSpeed Techlsquic_ietf_v1_parse_packet_in_begin (struct lsquic_packet_in *,
295392f7a3SLiteSpeed Tech            size_t length, int is_server, unsigned cid_len,
305392f7a3SLiteSpeed Tech            struct packin_parse_state *);
315392f7a3SLiteSpeed Tech
325392f7a3SLiteSpeed Techint
335392f7a3SLiteSpeed Techlsquic_Q046_parse_packet_in_begin (struct lsquic_packet_in *,
345392f7a3SLiteSpeed Tech            size_t length, int is_server, unsigned cid_len,
355392f7a3SLiteSpeed Tech            struct packin_parse_state *);
365392f7a3SLiteSpeed Tech
375392f7a3SLiteSpeed Techint
385392f7a3SLiteSpeed Techlsquic_Q046_parse_packet_in_begin (struct lsquic_packet_in *,
395392f7a3SLiteSpeed Tech            size_t length, int is_server, unsigned cid_len,
405392f7a3SLiteSpeed Tech            struct packin_parse_state *);
415392f7a3SLiteSpeed Tech
425392f7a3SLiteSpeed Techint
435392f7a3SLiteSpeed Techlsquic_ietf_v1_parse_packet_in_long_begin (struct lsquic_packet_in *,
445392f7a3SLiteSpeed Tech            size_t length, int is_server, unsigned cid_len,
455392f7a3SLiteSpeed Tech            struct packin_parse_state *);
465392f7a3SLiteSpeed Tech
475392f7a3SLiteSpeed Techint
485392f7a3SLiteSpeed Techlsquic_ietf_v1_parse_packet_in_short_begin (struct lsquic_packet_in *,
495392f7a3SLiteSpeed Tech            size_t length, int is_server, unsigned cid_len,
505392f7a3SLiteSpeed Tech            struct packin_parse_state *);
515392f7a3SLiteSpeed Tech
525392f7a3SLiteSpeed Techstruct sockaddr;
535392f7a3SLiteSpeed Techenum lsquic_version;
545392f7a3SLiteSpeed Techstruct lsquic_engine_public;
555392f7a3SLiteSpeed Tech
565392f7a3SLiteSpeed Techint
575392f7a3SLiteSpeed Techlsquic_gquic_gen_ver_nego_pkt (unsigned char *buf, size_t bufsz,
585392f7a3SLiteSpeed Tech                               const lsquic_cid_t *cid, unsigned versions);
595392f7a3SLiteSpeed Techint
605392f7a3SLiteSpeed Techlsquic_Q046_gen_ver_nego_pkt (unsigned char *buf, size_t bufsz,
615392f7a3SLiteSpeed Tech    const lsquic_cid_t *scid, const lsquic_cid_t *dcid, unsigned versions);
625392f7a3SLiteSpeed Techint
635392f7a3SLiteSpeed Techlsquic_ietf_v1_gen_ver_nego_pkt (unsigned char *buf, size_t bufsz,
645392f7a3SLiteSpeed Tech    const lsquic_cid_t *scid, const lsquic_cid_t *dcid, unsigned versions);
655392f7a3SLiteSpeed Techint
665392f7a3SLiteSpeed Techlsquic_iquic_gen_retry_pkt (unsigned char *buf, size_t bufsz,
675392f7a3SLiteSpeed Tech    const struct lsquic_engine_public *, const lsquic_cid_t *scid,
685392f7a3SLiteSpeed Tech    const lsquic_cid_t *dcid, enum lsquic_version, const struct sockaddr *,
695392f7a3SLiteSpeed Tech    uint8_t random_nybble);
705392f7a3SLiteSpeed Techssize_t
715392f7a3SLiteSpeed Techlsquic_generate_iquic_reset (const lsquic_cid_t *, unsigned char *buf,
725392f7a3SLiteSpeed Tech                                                            size_t buf_sz);
735392f7a3SLiteSpeed Tech
745392f7a3SLiteSpeed Tech#define GQUIC_RESET_SZ 33
755392f7a3SLiteSpeed Techssize_t
765392f7a3SLiteSpeed Techlsquic_generate_gquic_reset (const lsquic_cid_t *, unsigned char *buf,
775392f7a3SLiteSpeed Tech                                                            size_t buf_sz);
785392f7a3SLiteSpeed Tech
795392f7a3SLiteSpeed Techint
805392f7a3SLiteSpeed Techlsquic_is_valid_iquic_hs_packet (const unsigned char *buf, size_t buf_sz,
815392f7a3SLiteSpeed Tech                                                    lsquic_ver_tag_t *tag);
825392f7a3SLiteSpeed Tech
835392f7a3SLiteSpeed Techint
845392f7a3SLiteSpeed Techlsquic_is_valid_ietf_v1_or_Q046_hs_packet (const unsigned char *buf,
855392f7a3SLiteSpeed Tech                                    size_t length, lsquic_ver_tag_t *tagp);
869626cfc2SDmitri Tikhonov
8714e3680dSDmitri Tikhonov/* Instead of just -1 like CHECK_SPACE(), this macro returns the number
8814e3680dSDmitri Tikhonov * of bytes needed.
8914e3680dSDmitri Tikhonov */
9014e3680dSDmitri Tikhonov#define CHECK_STREAM_SPACE(need, pstart, pend) do {                 \
9114e3680dSDmitri Tikhonov    if ((intptr_t) (need) > ((pend) - (pstart))) {                  \
9214e3680dSDmitri Tikhonov        return -((int) (need));                                     \
9314e3680dSDmitri Tikhonov    }                                                               \
9414e3680dSDmitri Tikhonov} while (0)
9514e3680dSDmitri Tikhonov
969626cfc2SDmitri Tikhonov#endif
97