lsquic_parse_gquic_be.h revision bfc7bfd8 
1/* Copyright (c) 2017 LiteSpeed Technologies Inc.  See LICENSE. */
2#ifndef LSQUIC_PARSE_GQUIC_BE_H
3#define LSQUIC_PARSE_GQUIC_BE_H
4
5/* Header file to make it easy to reference gQUIC parsing functions.  This
6 * is only meant to be used internally.  The alternative would be to place
7 * all gQUIC-big-endian functions -- from all versions -- in a single file,
8 * and that would be a mess.
9 */
10
11#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__NetBSD__)
12#include <sys/endian.h>
13#define bswap_16 bswap16
14#define bswap_32 bswap32
15#define bswap_64 bswap64
16#elif defined(__APPLE__)
17#include <libkern/OSByteOrder.h>
18#define bswap_16 OSSwapInt16
19#define bswap_32 OSSwapInt32
20#define bswap_64 OSSwapInt64
21#else
22#include <byteswap.h>
23#endif
24
25#define CHECK_SPACE(need, pstart, pend)  \
26    do { if ((intptr_t) (need) > ((pend) - (pstart))) { return -1; } } while (0)
27
28#if __BYTE_ORDER == __LITTLE_ENDIAN
29#define READ_UINT(varname, varwidth, src, nbytes) do {                      \
30    varname = 0;                                                            \
31    memcpy((unsigned char *) &varname + varwidth / 8 - (nbytes), (src),     \
32                                                                (nbytes));  \
33    varname = bswap_##varwidth(varname);                                    \
34} while (0)
35#else
36#define READ_UINT(varname, varwidth, src, nbytes) do {                      \
37    varname = 0;                                                            \
38    memcpy((unsigned char *) &varname + varwidth / 8 - (nbytes), (src),     \
39                                                                (nbytes));  \
40} while (0)
41#endif
42
43uint64_t
44gquic_be_read_float_time16 (const void *mem);
45
46void
47gquic_be_write_float_time16 (lsquic_time_t time_us, void *mem);
48
49void
50gquic_be_parse_packet_in_finish (lsquic_packet_in_t *packet_in,
51                                            struct packin_parse_state *state);
52
53int
54gquic_be_gen_ver_nego_pkt (unsigned char *buf, size_t bufsz, uint64_t conn_id,
55                  unsigned version_bitmask);
56
57int
58gquic_be_gen_reg_pkt_header (unsigned char *buf, size_t bufsz, const lsquic_cid_t *conn_id,
59                    const lsquic_ver_tag_t *ver, const unsigned char *nonce,
60                    lsquic_packno_t packno, enum lsquic_packno_bits bits);
61
62int
63gquic_be_gen_stream_frame (unsigned char *buf, size_t buf_len, uint32_t stream_id,
64                  uint64_t offset, int fin, size_t size,
65                  gsf_read_f gsf_read, void *stream);
66
67int
68gquic_be_parse_stream_frame (const unsigned char *buf, size_t rem_packet_sz,
69                       stream_frame_t *stream_frame);
70
71lsquic_packno_t
72gquic_be_parse_ack_high (const unsigned char *buf, size_t buf_len);
73
74int
75gquic_be_parse_ack_frame (const unsigned char *buf, size_t buf_len, ack_info_t *ack);
76
77int
78gquic_be_gen_stop_waiting_frame(unsigned char *buf, size_t buf_len,
79                lsquic_packno_t cur_packno, enum lsquic_packno_bits bits,
80                lsquic_packno_t least_unacked_packno);
81
82int
83gquic_be_parse_stop_waiting_frame (const unsigned char *buf, size_t buf_len,
84                 lsquic_packno_t cur_packno, enum lsquic_packno_bits bits,
85                 lsquic_packno_t *least_unacked);
86
87int
88gquic_be_skip_stop_waiting_frame (size_t buf_len, enum lsquic_packno_bits bits);
89
90int
91gquic_be_gen_window_update_frame (unsigned char *buf, int buf_len, uint32_t stream_id,
92                         uint64_t offset);
93
94int
95gquic_be_parse_window_update_frame (const unsigned char *buf, size_t buf_len,
96                              uint32_t *stream_id, uint64_t *offset);
97
98int
99gquic_be_gen_blocked_frame (unsigned char *buf, size_t buf_len, uint32_t stream_id);
100
101int
102gquic_be_parse_blocked_frame (const unsigned char *buf, size_t buf_len,
103                                                    uint32_t *stream_id);
104
105int
106gquic_be_gen_rst_frame (unsigned char *buf, size_t buf_len, uint32_t stream_id,
107                    uint64_t offset, uint32_t error_code);
108
109int
110gquic_be_parse_rst_frame (const unsigned char *buf, size_t buf_len, uint32_t *stream_id,
111                    uint64_t *offset, uint32_t *error_code);
112
113int
114gquic_be_gen_ping_frame (unsigned char *buf, int buf_len);
115
116int
117gquic_be_gen_connect_close_frame (unsigned char *buf, int buf_len, uint32_t error_code,
118                            const char *reason, int reason_len);
119
120int
121gquic_be_parse_connect_close_frame (const unsigned char *buf, size_t buf_len,
122        uint32_t *error_code, uint16_t *reason_len, uint8_t *reason_offset);
123
124int
125gquic_be_gen_goaway_frame(unsigned char *buf, size_t buf_len, uint32_t error_code,
126                     uint32_t last_good_stream_id, const char *reason,
127                     size_t reason_len);
128
129int
130gquic_be_parse_goaway_frame (const unsigned char *buf, size_t buf_len,
131                       uint32_t *error_code, uint32_t *last_good_stream_id,
132                       uint16_t *reason_length, const char **reason);
133
134int
135gquic_be_gen_ack_frame (unsigned char *outbuf, size_t outbuf_sz,
136        gaf_rechist_first_f rechist_first, gaf_rechist_next_f rechist_next,
137        gaf_rechist_largest_recv_f rechist_largest_recv,
138        void *rechist, lsquic_time_t now, int *has_missing);
139
140#endif
141