lsquic_packet_common.h revision b1a7c3f9
1/* Copyright (c) 2017 - 2020 LiteSpeed Technologies Inc. See LICENSE. */ 2#ifndef LSQUIC_PACKET_COMMON_H 3#define LSQUIC_PACKET_COMMON_H 1 4 5/* The list of frames contains frames both in GQUIC and in IETF QUIC. 6 * They are marked as follows: 7 * G Applicable to GQUIC only 8 * I Applicable to IETF QUIC only 9 * B Applicable to both GQUIC and IETF QUIC. 10 */ 11enum quic_frame_type 12{ 13 QUIC_FRAME_INVALID, 14 QUIC_FRAME_STREAM, /* B */ 15 QUIC_FRAME_ACK, /* B */ 16 QUIC_FRAME_PADDING, /* B */ 17 QUIC_FRAME_RST_STREAM, /* B */ 18 QUIC_FRAME_CONNECTION_CLOSE, /* B */ 19 QUIC_FRAME_GOAWAY, /* G */ 20 QUIC_FRAME_WINDOW_UPDATE, /* G */ 21 QUIC_FRAME_BLOCKED, /* B */ 22 QUIC_FRAME_STOP_WAITING, /* G */ 23 QUIC_FRAME_PING, /* B */ 24 QUIC_FRAME_MAX_DATA, /* I */ 25 QUIC_FRAME_MAX_STREAM_DATA, /* I */ 26 QUIC_FRAME_MAX_STREAMS, /* I */ 27 QUIC_FRAME_STREAM_BLOCKED, /* I */ 28 QUIC_FRAME_STREAMS_BLOCKED, /* I */ 29 QUIC_FRAME_NEW_CONNECTION_ID, /* I */ 30 QUIC_FRAME_STOP_SENDING, /* I */ 31 QUIC_FRAME_PATH_CHALLENGE, /* I */ 32 QUIC_FRAME_PATH_RESPONSE, /* I */ 33 QUIC_FRAME_CRYPTO, /* B */ 34 QUIC_FRAME_RETIRE_CONNECTION_ID,/* I */ 35 QUIC_FRAME_NEW_TOKEN, /* I */ 36 QUIC_FRAME_HANDSHAKE_DONE, /* I */ 37 QUIC_FRAME_ACK_FREQUENCY, /* I */ 38 QUIC_FRAME_TIMESTAMP, /* I */ 39 QUIC_FRAME_DATAGRAM, /* I */ 40 N_QUIC_FRAMES 41}; 42 43enum quic_ft_bit { 44 QUIC_FTBIT_INVALID = 1 << QUIC_FRAME_INVALID, 45 QUIC_FTBIT_STREAM = 1 << QUIC_FRAME_STREAM, 46 QUIC_FTBIT_ACK = 1 << QUIC_FRAME_ACK, 47 QUIC_FTBIT_PADDING = 1 << QUIC_FRAME_PADDING, 48 QUIC_FTBIT_RST_STREAM = 1 << QUIC_FRAME_RST_STREAM, 49 QUIC_FTBIT_CONNECTION_CLOSE = 1 << QUIC_FRAME_CONNECTION_CLOSE, 50 QUIC_FTBIT_GOAWAY = 1 << QUIC_FRAME_GOAWAY, 51 QUIC_FTBIT_WINDOW_UPDATE = 1 << QUIC_FRAME_WINDOW_UPDATE, 52 QUIC_FTBIT_BLOCKED = 1 << QUIC_FRAME_BLOCKED, 53 QUIC_FTBIT_STOP_WAITING = 1 << QUIC_FRAME_STOP_WAITING, 54 QUIC_FTBIT_PING = 1 << QUIC_FRAME_PING, 55 QUIC_FTBIT_MAX_DATA = 1 << QUIC_FRAME_MAX_DATA, 56 QUIC_FTBIT_MAX_STREAM_DATA = 1 << QUIC_FRAME_MAX_STREAM_DATA, 57 QUIC_FTBIT_MAX_STREAMS = 1 << QUIC_FRAME_MAX_STREAMS, 58 QUIC_FTBIT_STREAM_BLOCKED = 1 << QUIC_FRAME_STREAM_BLOCKED, 59 QUIC_FTBIT_STREAMS_BLOCKED = 1 << QUIC_FRAME_STREAMS_BLOCKED, 60 QUIC_FTBIT_NEW_CONNECTION_ID = 1 << QUIC_FRAME_NEW_CONNECTION_ID, 61 QUIC_FTBIT_STOP_SENDING = 1 << QUIC_FRAME_STOP_SENDING, 62 QUIC_FTBIT_PATH_CHALLENGE = 1 << QUIC_FRAME_PATH_CHALLENGE, 63 QUIC_FTBIT_PATH_RESPONSE = 1 << QUIC_FRAME_PATH_RESPONSE, 64 QUIC_FTBIT_CRYPTO = 1 << QUIC_FRAME_CRYPTO, 65 QUIC_FTBIT_NEW_TOKEN = 1 << QUIC_FRAME_NEW_TOKEN, 66 QUIC_FTBIT_RETIRE_CONNECTION_ID = 1 << QUIC_FRAME_RETIRE_CONNECTION_ID, 67 QUIC_FTBIT_HANDSHAKE_DONE = 1 << QUIC_FRAME_HANDSHAKE_DONE, 68 QUIC_FTBIT_ACK_FREQUENCY = 1 << QUIC_FRAME_ACK_FREQUENCY, 69 QUIC_FTBIT_TIMESTAMP = 1 << QUIC_FRAME_TIMESTAMP, 70 QUIC_FTBIT_DATAGRAM = 1 << QUIC_FRAME_DATAGRAM, 71}; 72 73static const char * const frame_type_2_str[N_QUIC_FRAMES] = { 74 [QUIC_FRAME_INVALID] = "QUIC_FRAME_INVALID", 75 [QUIC_FRAME_STREAM] = "QUIC_FRAME_STREAM", 76 [QUIC_FRAME_ACK] = "QUIC_FRAME_ACK", 77 [QUIC_FRAME_PADDING] = "QUIC_FRAME_PADDING", 78 [QUIC_FRAME_RST_STREAM] = "QUIC_FRAME_RST_STREAM", 79 [QUIC_FRAME_CONNECTION_CLOSE] = "QUIC_FRAME_CONNECTION_CLOSE", 80 [QUIC_FRAME_GOAWAY] = "QUIC_FRAME_GOAWAY", 81 [QUIC_FRAME_WINDOW_UPDATE] = "QUIC_FRAME_WINDOW_UPDATE", 82 [QUIC_FRAME_BLOCKED] = "QUIC_FRAME_BLOCKED", 83 [QUIC_FRAME_STOP_WAITING] = "QUIC_FRAME_STOP_WAITING", 84 [QUIC_FRAME_PING] = "QUIC_FRAME_PING", 85 [QUIC_FRAME_MAX_DATA] = "QUIC_FRAME_MAX_DATA", 86 [QUIC_FRAME_MAX_STREAM_DATA] = "QUIC_FRAME_MAX_STREAM_DATA", 87 [QUIC_FRAME_MAX_STREAMS] = "QUIC_FRAME_MAX_STREAMS", 88 [QUIC_FRAME_STREAM_BLOCKED] = "QUIC_FRAME_STREAM_BLOCKED", 89 [QUIC_FRAME_STREAMS_BLOCKED] = "QUIC_FRAME_STREAMS_BLOCKED", 90 [QUIC_FRAME_NEW_CONNECTION_ID] = "QUIC_FRAME_NEW_CONNECTION_ID", 91 [QUIC_FRAME_STOP_SENDING] = "QUIC_FRAME_STOP_SENDING", 92 [QUIC_FRAME_PATH_CHALLENGE] = "QUIC_FRAME_PATH_CHALLENGE", 93 [QUIC_FRAME_PATH_RESPONSE] = "QUIC_FRAME_PATH_RESPONSE", 94 [QUIC_FRAME_CRYPTO] = "QUIC_FRAME_CRYPTO", 95 [QUIC_FRAME_NEW_TOKEN] = "QUIC_FRAME_NEW_TOKEN", 96 [QUIC_FRAME_RETIRE_CONNECTION_ID] = "QUIC_FRAME_RETIRE_CONNECTION_ID", 97 [QUIC_FRAME_HANDSHAKE_DONE] = "QUIC_FRAME_HANDSHAKE_DONE", 98 [QUIC_FRAME_ACK_FREQUENCY] = "QUIC_FRAME_ACK_FREQUENCY", 99 [QUIC_FRAME_TIMESTAMP] = "QUIC_FRAME_TIMESTAMP", 100 [QUIC_FRAME_DATAGRAM] = "QUIC_FRAME_DATAGRAM", 101}; 102 103#define QUIC_FRAME_PRELEN (sizeof("QUIC_FRAME_")) 104#define QUIC_FRAME_SLEN(x) (sizeof(#x) - QUIC_FRAME_PRELEN) 105#define QUIC_FRAME_NAME(i) (frame_type_2_str[i] + QUIC_FRAME_PRELEN - 1) 106 107 108 /* We don't need to include INVALID frame in this list because it is 109 * never a part of any frame list bitmask (e.g. po_frame_types). 110 */ 111#define lsquic_frame_types_str_sz \ 112 QUIC_FRAME_SLEN(QUIC_FRAME_STREAM) + 1 + \ 113 QUIC_FRAME_SLEN(QUIC_FRAME_ACK) + 1 + \ 114 QUIC_FRAME_SLEN(QUIC_FRAME_PADDING) + 1 + \ 115 QUIC_FRAME_SLEN(QUIC_FRAME_RST_STREAM) + 1 + \ 116 QUIC_FRAME_SLEN(QUIC_FRAME_CONNECTION_CLOSE) + 1 + \ 117 QUIC_FRAME_SLEN(QUIC_FRAME_GOAWAY) + 1 + \ 118 QUIC_FRAME_SLEN(QUIC_FRAME_WINDOW_UPDATE) + 1 + \ 119 QUIC_FRAME_SLEN(QUIC_FRAME_BLOCKED) + 1 + \ 120 QUIC_FRAME_SLEN(QUIC_FRAME_STOP_WAITING) + 1 + \ 121 QUIC_FRAME_SLEN(QUIC_FRAME_PING) + 1 + \ 122 QUIC_FRAME_SLEN(QUIC_FRAME_MAX_DATA) + 1 + \ 123 QUIC_FRAME_SLEN(QUIC_FRAME_MAX_STREAM_DATA) + 1 + \ 124 QUIC_FRAME_SLEN(QUIC_FRAME_MAX_STREAMS) + 1 + \ 125 QUIC_FRAME_SLEN(QUIC_FRAME_STREAM_BLOCKED) + 1 + \ 126 QUIC_FRAME_SLEN(QUIC_FRAME_STREAMS_BLOCKED) + 1 + \ 127 QUIC_FRAME_SLEN(QUIC_FRAME_NEW_CONNECTION_ID) + 1 + \ 128 QUIC_FRAME_SLEN(QUIC_FRAME_STOP_SENDING) + 1 + \ 129 QUIC_FRAME_SLEN(QUIC_FRAME_PATH_CHALLENGE) + 1 + \ 130 QUIC_FRAME_SLEN(QUIC_FRAME_PATH_RESPONSE) + 1 + \ 131 QUIC_FRAME_SLEN(QUIC_FRAME_CRYPTO) + 1 + \ 132 QUIC_FRAME_SLEN(QUIC_FRAME_RETIRE_CONNECTION_ID) \ 133 + 1 + \ 134 QUIC_FRAME_SLEN(QUIC_FRAME_NEW_TOKEN) + 1 + \ 135 QUIC_FRAME_SLEN(QUIC_FRAME_HANDSHAKE_DONE) + 1 + \ 136 QUIC_FRAME_SLEN(QUIC_FRAME_ACK_FREQUENCY) + 1 + \ 137 QUIC_FRAME_SLEN(QUIC_FRAME_TIMESTAMP) + 1 + \ 138 QUIC_FRAME_SLEN(QUIC_FRAME_DATAGRAM) + 1 + \ 139 0 140 141 142const char * 143lsquic_frame_types_to_str (char *buf, size_t bufsz, enum quic_ft_bit); 144 145/* This value represents a different number of bytes used to encode the packet 146 * length based on whether GQUIC or IQUIC is used. 147 */ 148enum packno_bits 149{ 150 PACKNO_BITS_0 = 0, 151 PACKNO_BITS_1 = 1, 152 PACKNO_BITS_2 = 2, 153 PACKNO_BITS_3 = 3, 154}; 155 156 157/* GQUIC maps 0, 1, 2, 3 -> 1, 2, 4, 6 */ 158enum 159{ 160 GQUIC_PACKNO_LEN_1 = PACKNO_BITS_0, 161 GQUIC_PACKNO_LEN_2 = PACKNO_BITS_1, 162 GQUIC_PACKNO_LEN_4 = PACKNO_BITS_2, 163 GQUIC_PACKNO_LEN_6 = PACKNO_BITS_3, 164}; 165 166 167/* IQUIC maps 0, 1, 2, 3 -> 1, 2, 3, 4 (as of ID-17) */ 168enum 169{ 170 IQUIC_PACKNO_LEN_1 = PACKNO_BITS_0, 171 IQUIC_PACKNO_LEN_2 = PACKNO_BITS_1, 172 IQUIC_PACKNO_LEN_3 = PACKNO_BITS_2, 173 IQUIC_PACKNO_LEN_4 = PACKNO_BITS_3, 174}; 175 176 177enum header_type 178{ 179 HETY_NOT_SET, /* This value must be zero */ 180 HETY_VERNEG, 181 HETY_INITIAL, 182 HETY_RETRY, 183 HETY_HANDSHAKE, 184 HETY_0RTT, 185}; 186 187extern const char *const lsquic_hety2str[]; 188 189#define IQUIC_MAX_PACKNO ((1ULL << 62) - 1) 190#define IQUIC_INVALID_PACKNO (IQUIC_MAX_PACKNO + 1) 191 192/* IETF QUIC only: */ 193#define is_valid_packno(packno) ((packno) <= IQUIC_MAX_PACKNO) 194 195enum packnum_space 196{ 197 PNS_INIT, 198 PNS_HSK, 199 PNS_APP, 200 N_PNS 201}; 202 203extern const enum packnum_space lsquic_hety2pns[]; 204extern const enum packnum_space lsquic_enclev2pns[]; 205extern const char *const lsquic_pns2str[]; 206 207#define ALL_IQUIC_FRAMES ( \ 208 QUIC_FTBIT_STREAM \ 209 | QUIC_FTBIT_ACK \ 210 | QUIC_FTBIT_PADDING \ 211 | QUIC_FTBIT_RST_STREAM \ 212 | QUIC_FTBIT_CONNECTION_CLOSE \ 213 | QUIC_FTBIT_BLOCKED \ 214 | QUIC_FTBIT_PING \ 215 | QUIC_FTBIT_MAX_DATA \ 216 | QUIC_FTBIT_MAX_STREAM_DATA \ 217 | QUIC_FTBIT_MAX_STREAMS \ 218 | QUIC_FTBIT_STREAM_BLOCKED \ 219 | QUIC_FTBIT_STREAMS_BLOCKED \ 220 | QUIC_FTBIT_NEW_CONNECTION_ID \ 221 | QUIC_FTBIT_STOP_SENDING \ 222 | QUIC_FTBIT_PATH_CHALLENGE \ 223 | QUIC_FTBIT_PATH_RESPONSE \ 224 | QUIC_FTBIT_RETIRE_CONNECTION_ID \ 225 | QUIC_FTBIT_NEW_TOKEN \ 226 | QUIC_FTBIT_HANDSHAKE_DONE \ 227 | QUIC_FTBIT_ACK_FREQUENCY \ 228 | QUIC_FTBIT_TIMESTAMP \ 229 | QUIC_FTBIT_CRYPTO ) 230 231/* [draft-ietf-quic-transport-24] Section 1.2 */ 232#define IQUIC_FRAME_ACKABLE_MASK ( \ 233 ALL_IQUIC_FRAMES & ~(QUIC_FTBIT_ACK|QUIC_FTBIT_PADDING\ 234 |QUIC_FTBIT_CONNECTION_CLOSE|QUIC_FTBIT_TIMESTAMP)) 235 236/* [draft-ietf-quic-transport-20], Section 13.2 */ 237/* We bend some rules and retransmit BLOCKED, MAX_DATA, MAX_STREAM_DATA, 238 * MAX_STREAMS, STREAM_BLOCKED, and STREAMS_BLOCKED frames instead of 239 * regenerating them. This keeps the code simple(r). 240 */ 241#define IQUIC_FRAME_RETX_MASK ( \ 242 ALL_IQUIC_FRAMES & ~(QUIC_FTBIT_PADDING|QUIC_FTBIT_PATH_RESPONSE \ 243 |QUIC_FTBIT_PATH_CHALLENGE|QUIC_FTBIT_ACK|QUIC_FTBIT_TIMESTAMP)) 244 245extern const enum quic_ft_bit lsquic_legal_frames_by_level[][4]; 246 247/* Applies both to gQUIC and IETF QUIC, thus "B" for "both" */ 248#define BQUIC_FRAME_REGEN_MASK ((1 << QUIC_FRAME_ACK) \ 249 | (1 << QUIC_FRAME_PATH_CHALLENGE) | (1 << QUIC_FRAME_PATH_RESPONSE) \ 250 | (1 << QUIC_FRAME_STOP_WAITING) | (1 << QUIC_FRAME_TIMESTAMP)) 251 252#endif 253