lsquic_parse_gquic_be.h revision 5d77f141
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#elif defined(WIN32) 22#define bswap_16 _byteswap_ushort 23#define bswap_32 _byteswap_ulong 24#define bswap_64 _byteswap_uint64 25#else 26#include <byteswap.h> 27#endif 28 29#define CHECK_SPACE(need, pstart, pend) \ 30 do { if ((intptr_t) (need) > ((pend) - (pstart))) { return -1; } } while (0) 31 32#if __BYTE_ORDER == __LITTLE_ENDIAN 33#define READ_UINT(varname, varwidth, src, nbytes) do { \ 34 varname = 0; \ 35 memcpy((unsigned char *) &varname + varwidth / 8 - (nbytes), (src), \ 36 (nbytes)); \ 37 varname = bswap_##varwidth(varname); \ 38} while (0) 39#else 40#define READ_UINT(varname, varwidth, src, nbytes) do { \ 41 varname = 0; \ 42 memcpy((unsigned char *) &varname + varwidth / 8 - (nbytes), (src), \ 43 (nbytes)); \ 44} while (0) 45#endif 46 47uint64_t 48gquic_be_read_float_time16 (const void *mem); 49 50void 51gquic_be_write_float_time16 (lsquic_time_t time_us, void *mem); 52 53void 54gquic_be_parse_packet_in_finish (lsquic_packet_in_t *packet_in, 55 struct packin_parse_state *state); 56 57int 58gquic_be_gen_ver_nego_pkt (unsigned char *buf, size_t bufsz, uint64_t conn_id, 59 unsigned version_bitmask); 60 61int 62gquic_be_gen_reg_pkt_header (unsigned char *buf, size_t bufsz, const lsquic_cid_t *conn_id, 63 const lsquic_ver_tag_t *ver, const unsigned char *nonce, 64 lsquic_packno_t packno, enum lsquic_packno_bits bits); 65 66int 67gquic_be_gen_stream_frame (unsigned char *buf, size_t buf_len, uint32_t stream_id, 68 uint64_t offset, int fin, size_t size, 69 gsf_read_f gsf_read, void *stream); 70 71int 72gquic_be_parse_stream_frame (const unsigned char *buf, size_t rem_packet_sz, 73 stream_frame_t *stream_frame); 74 75lsquic_packno_t 76gquic_be_parse_ack_high (const unsigned char *buf, size_t buf_len); 77 78int 79gquic_be_parse_ack_frame (const unsigned char *buf, size_t buf_len, ack_info_t *ack); 80 81int 82gquic_be_gen_stop_waiting_frame(unsigned char *buf, size_t buf_len, 83 lsquic_packno_t cur_packno, enum lsquic_packno_bits bits, 84 lsquic_packno_t least_unacked_packno); 85 86int 87gquic_be_parse_stop_waiting_frame (const unsigned char *buf, size_t buf_len, 88 lsquic_packno_t cur_packno, enum lsquic_packno_bits bits, 89 lsquic_packno_t *least_unacked); 90 91int 92gquic_be_skip_stop_waiting_frame (size_t buf_len, enum lsquic_packno_bits bits); 93 94int 95gquic_be_gen_window_update_frame (unsigned char *buf, int buf_len, uint32_t stream_id, 96 uint64_t offset); 97 98int 99gquic_be_parse_window_update_frame (const unsigned char *buf, size_t buf_len, 100 uint32_t *stream_id, uint64_t *offset); 101 102int 103gquic_be_gen_blocked_frame (unsigned char *buf, size_t buf_len, uint32_t stream_id); 104 105int 106gquic_be_parse_blocked_frame (const unsigned char *buf, size_t buf_len, 107 uint32_t *stream_id); 108 109int 110gquic_be_gen_rst_frame (unsigned char *buf, size_t buf_len, uint32_t stream_id, 111 uint64_t offset, uint32_t error_code); 112 113int 114gquic_be_parse_rst_frame (const unsigned char *buf, size_t buf_len, uint32_t *stream_id, 115 uint64_t *offset, uint32_t *error_code); 116 117int 118gquic_be_gen_ping_frame (unsigned char *buf, int buf_len); 119 120int 121gquic_be_gen_connect_close_frame (unsigned char *buf, int buf_len, uint32_t error_code, 122 const char *reason, int reason_len); 123 124int 125gquic_be_parse_connect_close_frame (const unsigned char *buf, size_t buf_len, 126 uint32_t *error_code, uint16_t *reason_len, uint8_t *reason_offset); 127 128int 129gquic_be_gen_goaway_frame(unsigned char *buf, size_t buf_len, uint32_t error_code, 130 uint32_t last_good_stream_id, const char *reason, 131 size_t reason_len); 132 133int 134gquic_be_parse_goaway_frame (const unsigned char *buf, size_t buf_len, 135 uint32_t *error_code, uint32_t *last_good_stream_id, 136 uint16_t *reason_length, const char **reason); 137 138int 139gquic_be_gen_ack_frame (unsigned char *outbuf, size_t outbuf_sz, 140 gaf_rechist_first_f rechist_first, gaf_rechist_next_f rechist_next, 141 gaf_rechist_largest_recv_f rechist_largest_recv, 142 void *rechist, lsquic_time_t now, int *has_missing, lsquic_packno_t *); 143 144#endif 145