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annotate src/event/ngx_event_quic_transport.h @ 8411:7995cd199b52 quic

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Merged with the default branch.
author Sergey Kandaurov <pluknet@nginx.com>
date Tue, 26 May 2020 20:26:44 +0300
parents eebdda507ec3
children 125cbfa77013
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1
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2 /*
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3 * Copyright (C) Nginx, Inc.
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4 */
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7 #ifndef _NGX_EVENT_QUIC_WIRE_H_INCLUDED_
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8 #define _NGX_EVENT_QUIC_WIRE_H_INCLUDED_
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10
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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15 /* QUIC flags in first byte, see quic-transport 17.2 and 17.3 */
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16
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17 #define NGX_QUIC_PKT_LONG 0x80 /* header form */
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18 #define NGX_QUIC_PKT_FIXED_BIT 0x40
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19 #define NGX_QUIC_PKT_TYPE 0x30 /* in long packet */
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20 #define NGX_QUIC_PKT_KPHASE 0x04 /* in short packet */
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22 #define NGX_QUIC_PKT_LONG_RESERVED_BIT 0x0C
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23 #define NGX_QUIC_PKT_SHORT_RESERVED_BIT 0x18
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25 #define ngx_quic_long_pkt(flags) ((flags) & NGX_QUIC_PKT_LONG)
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26 #define ngx_quic_short_pkt(flags) (((flags) & NGX_QUIC_PKT_LONG) == 0)
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28 /* Long packet types */
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29 #define NGX_QUIC_PKT_INITIAL 0x00
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30 #define NGX_QUIC_PKT_ZRTT 0x10
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31 #define NGX_QUIC_PKT_HANDSHAKE 0x20
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32 #define NGX_QUIC_PKT_RETRY 0x30
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34 #define ngx_quic_pkt_in(flags) \
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35 (((flags) & NGX_QUIC_PKT_TYPE) == NGX_QUIC_PKT_INITIAL)
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36 #define ngx_quic_pkt_zrtt(flags) \
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37 (((flags) & NGX_QUIC_PKT_TYPE) == NGX_QUIC_PKT_ZRTT)
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38 #define ngx_quic_pkt_hs(flags) \
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39 (((flags) & NGX_QUIC_PKT_TYPE) == NGX_QUIC_PKT_HANDSHAKE)
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40 #define ngx_quic_pkt_retry(flags) \
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41 (((flags) & NGX_QUIC_PKT_TYPE) == NGX_QUIC_PKT_RETRY)
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43
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44 /* 12.4. Frames and Frame Types */
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45 #define NGX_QUIC_FT_PADDING 0x00
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46 #define NGX_QUIC_FT_PING 0x01
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47 #define NGX_QUIC_FT_ACK 0x02
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48 #define NGX_QUIC_FT_ACK_ECN 0x03
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49 #define NGX_QUIC_FT_RESET_STREAM 0x04
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50 #define NGX_QUIC_FT_STOP_SENDING 0x05
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51 #define NGX_QUIC_FT_CRYPTO 0x06
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52 #define NGX_QUIC_FT_NEW_TOKEN 0x07
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53 #define NGX_QUIC_FT_STREAM0 0x08
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54 #define NGX_QUIC_FT_STREAM1 0x09
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55 #define NGX_QUIC_FT_STREAM2 0x0A
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56 #define NGX_QUIC_FT_STREAM3 0x0B
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57 #define NGX_QUIC_FT_STREAM4 0x0C
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58 #define NGX_QUIC_FT_STREAM5 0x0D
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59 #define NGX_QUIC_FT_STREAM6 0x0E
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60 #define NGX_QUIC_FT_STREAM7 0x0F
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61 #define NGX_QUIC_FT_MAX_DATA 0x10
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62 #define NGX_QUIC_FT_MAX_STREAM_DATA 0x11
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63 #define NGX_QUIC_FT_MAX_STREAMS 0x12
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64 #define NGX_QUIC_FT_MAX_STREAMS2 0x13
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65 #define NGX_QUIC_FT_DATA_BLOCKED 0x14
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66 #define NGX_QUIC_FT_STREAM_DATA_BLOCKED 0x15
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67 #define NGX_QUIC_FT_STREAMS_BLOCKED 0x16
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68 #define NGX_QUIC_FT_STREAMS_BLOCKED2 0x17
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69 #define NGX_QUIC_FT_NEW_CONNECTION_ID 0x18
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70 #define NGX_QUIC_FT_RETIRE_CONNECTION_ID 0x19
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71 #define NGX_QUIC_FT_PATH_CHALLENGE 0x1A
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72 #define NGX_QUIC_FT_PATH_RESPONSE 0x1B
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73 #define NGX_QUIC_FT_CONNECTION_CLOSE 0x1C
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74 #define NGX_QUIC_FT_CONNECTION_CLOSE2 0x1D
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75 #define NGX_QUIC_FT_HANDSHAKE_DONE 0x1E
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76
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77 /* 22.4. QUIC Transport Error Codes Registry */
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78 #define NGX_QUIC_ERR_NO_ERROR 0x00
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79 #define NGX_QUIC_ERR_INTERNAL_ERROR 0x01
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80 #define NGX_QUIC_ERR_SERVER_BUSY 0x02
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81 #define NGX_QUIC_ERR_FLOW_CONTROL_ERROR 0x03
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82 #define NGX_QUIC_ERR_STREAM_LIMIT_ERROR 0x04
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83 #define NGX_QUIC_ERR_STREAM_STATE_ERROR 0x05
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84 #define NGX_QUIC_ERR_FINAL_SIZE_ERROR 0x06
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85 #define NGX_QUIC_ERR_FRAME_ENCODING_ERROR 0x07
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86 #define NGX_QUIC_ERR_TRANSPORT_PARAMETER_ERROR 0x08
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87 #define NGX_QUIC_ERR_CONNECTION_ID_LIMIT_ERROR 0x09
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88 #define NGX_QUIC_ERR_PROTOCOL_VIOLATION 0x0A
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89 #define NGX_QUIC_ERR_INVALID_TOKEN 0x0B
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90 /* 0xC is not defined */
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91 #define NGX_QUIC_ERR_CRYPTO_BUFFER_EXCEEDED 0x0D
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92 /* 0xE is not defined */
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93 /* 0xF is not defined */
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94 #define NGX_QUIC_ERR_CRYPTO_ERROR 0x10
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95
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96 #define NGX_QUIC_ERR_LAST NGX_QUIC_ERR_CRYPTO_ERROR
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97
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98 /* Transport parameters */
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99 #define NGX_QUIC_TP_ORIGINAL_CONNECTION_ID 0x00
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100 #define NGX_QUIC_TP_MAX_IDLE_TIMEOUT 0x01
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101 #define NGX_QUIC_TP_STATELESS_RESET_TOKEN 0x02
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102 #define NGX_QUIC_TP_MAX_PACKET_SIZE 0x03
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103 #define NGX_QUIC_TP_INITIAL_MAX_DATA 0x04
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104 #define NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL 0x05
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105 #define NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE 0x06
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106 #define NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI 0x07
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107 #define NGX_QUIC_TP_INITIAL_MAX_STREAMS_BIDI 0x08
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108 #define NGX_QUIC_TP_INITIAL_MAX_STREAMS_UNI 0x09
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109 #define NGX_QUIC_TP_ACK_DELAY_EXPONENT 0x0A
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110 #define NGX_QUIC_TP_MAX_ACK_DELAY 0x0B
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111 #define NGX_QUIC_TP_DISABLE_ACTIVE_MIGRATION 0x0C
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112 #define NGX_QUIC_TP_PREFERRED_ADDRESS 0x0D
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113 #define NGX_QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT 0x0E
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114
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115 #define NGX_QUIC_CID_LEN_MIN 8
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116 #define NGX_QUIC_CID_LEN_MAX 20
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117
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118
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119 typedef struct {
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120 uint64_t largest;
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121 uint64_t delay;
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122 uint64_t range_count;
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123 uint64_t first_range;
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124 uint64_t ect0;
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125 uint64_t ect1;
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126 uint64_t ce;
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127 u_char *ranges_start;
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128 u_char *ranges_end;
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129 } ngx_quic_ack_frame_t;
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130
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131
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132 typedef struct {
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133 uint64_t seqnum;
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134 uint64_t retire;
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135 uint8_t len;
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136 u_char cid[NGX_QUIC_CID_LEN_MAX];
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137 u_char srt[16];
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138 } ngx_quic_new_conn_id_frame_t;
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139
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140
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141 typedef struct {
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142 uint64_t length;
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143 u_char *data;
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144 } ngx_quic_new_token_frame_t;
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145
8333
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146 /*
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147 * common layout for CRYPTO and STREAM frames;
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148 * conceptually, CRYPTO frame is also a stream
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149 * frame lacking some properties
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150 */
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151 typedef struct {
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152 uint64_t offset;
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153 uint64_t length;
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154 u_char *data;
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155 } ngx_quic_ordered_frame_t;
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156
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157 typedef ngx_quic_ordered_frame_t ngx_quic_crypto_frame_t;
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158
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159
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160 typedef struct {
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161 /* initial fields same as in ngx_quic_ordered_frame_t */
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162 uint64_t offset;
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163 uint64_t length;
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164 u_char *data;
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165
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166 uint8_t type;
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167 uint64_t stream_id;
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168 unsigned off:1;
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169 unsigned len:1;
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170 unsigned fin:1;
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171 } ngx_quic_stream_frame_t;
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172
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173
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174 typedef struct {
8237
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175 uint64_t max_data;
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176 } ngx_quic_max_data_frame_t;
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177
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178
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179 typedef struct {
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180 uint64_t error_code;
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181 uint64_t frame_type;
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182 ngx_str_t reason;
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183 } ngx_quic_close_frame_t;
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184
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185
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186 typedef struct {
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187 uint64_t id;
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diff changeset
188 uint64_t error_code;
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diff changeset
189 uint64_t final_size;
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190 } ngx_quic_reset_stream_frame_t;
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191
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192
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193 typedef struct {
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194 uint64_t id;
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195 uint64_t error_code;
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196 } ngx_quic_stop_sending_frame_t;
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197
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198
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199 typedef struct {
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200 uint64_t limit;
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201 ngx_uint_t bidi; /* unsigned: bidi:1 */
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202 } ngx_quic_streams_blocked_frame_t;
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203
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204
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205 typedef struct {
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206 uint64_t limit;
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207 ngx_uint_t bidi; /* unsigned: bidi:1 */
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208 } ngx_quic_max_streams_frame_t;
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209
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210
8257
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211 typedef struct {
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212 uint64_t id;
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213 uint64_t limit;
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214 } ngx_quic_max_stream_data_frame_t;
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215
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216
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217 typedef struct {
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diff changeset
218 uint64_t limit;
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219 } ngx_quic_data_blocked_frame_t;
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220
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221
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222 typedef struct {
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223 uint64_t id;
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diff changeset
224 uint64_t limit;
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225 } ngx_quic_stream_data_blocked_frame_t;
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226
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diff changeset
227
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228 typedef struct {
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229 uint64_t sequence_number;
085fd6e68367 Implemented parsing of remaining frame types.
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diff changeset
230 } ngx_quic_retire_cid_frame_t;
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231
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diff changeset
232
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233 typedef struct {
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diff changeset
234 u_char data[8];
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diff changeset
235 } ngx_quic_path_challenge_frame_t;
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236
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237
8224
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238 typedef struct ngx_quic_frame_s ngx_quic_frame_t;
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239
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diff changeset
240 struct ngx_quic_frame_s {
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diff changeset
241 ngx_uint_t type;
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diff changeset
242 enum ssl_encryption_level_t level;
8308
e10b4c61420f Implemented retransmission and retransmit queue.
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diff changeset
243 ngx_queue_t queue;
e10b4c61420f Implemented retransmission and retransmit queue.
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diff changeset
244 uint64_t pnum;
e10b4c61420f Implemented retransmission and retransmit queue.
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diff changeset
245 ngx_msec_t first;
e10b4c61420f Implemented retransmission and retransmit queue.
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diff changeset
246 ngx_msec_t last;
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diff changeset
247 ngx_uint_t need_ack;
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diff changeset
248 /* unsigned need_ack:1; */
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diff changeset
249
8286
c7185bc5b4d9 QUIC frames reuse.
Roman Arutyunyan <arut@nginx.com>
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diff changeset
250 u_char *data;
8224
ae35ccba7aa6 Extracted transport part of the code into separate file.
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diff changeset
251 union {
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diff changeset
252 ngx_quic_ack_frame_t ack;
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diff changeset
253 ngx_quic_crypto_frame_t crypto;
8333
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diff changeset
254 ngx_quic_ordered_frame_t ord;
8224
ae35ccba7aa6 Extracted transport part of the code into separate file.
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diff changeset
255 ngx_quic_new_conn_id_frame_t ncid;
8384
52d0c4832570 Address validation using NEW_TOKEN frame.
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parents: 8383
diff changeset
256 ngx_quic_new_token_frame_t token;
8224
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diff changeset
257 ngx_quic_stream_frame_t stream;
8237
ff540f13d95d MAX_DATA frame parser/handler.
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parents: 8236
diff changeset
258 ngx_quic_max_data_frame_t max_data;
8224
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259 ngx_quic_close_frame_t close;
8231
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diff changeset
260 ngx_quic_reset_stream_frame_t reset_stream;
78540e2160d0 Added parsing of RESET_STREAM and STOP_SENDING frames
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diff changeset
261 ngx_quic_stop_sending_frame_t stop_sending;
8236
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parents: 8231
diff changeset
262 ngx_quic_streams_blocked_frame_t streams_blocked;
8245
a14afe21e692 Double MAX_STREAMS on STREAMS_BLOCKED.
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parents: 8241
diff changeset
263 ngx_quic_max_streams_frame_t max_streams;
8257
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diff changeset
264 ngx_quic_max_stream_data_frame_t max_stream_data;
085fd6e68367 Implemented parsing of remaining frame types.
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parents: 8251
diff changeset
265 ngx_quic_data_blocked_frame_t data_blocked;
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diff changeset
266 ngx_quic_stream_data_blocked_frame_t stream_data_blocked;
085fd6e68367 Implemented parsing of remaining frame types.
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diff changeset
267 ngx_quic_retire_cid_frame_t retire_cid;
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diff changeset
268 ngx_quic_path_challenge_frame_t path_challenge;
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diff changeset
269 ngx_quic_path_challenge_frame_t path_response;
8224
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
270 } u;
8371
9d9531431c8c Removed outdated/incorrect comments and fixed style.
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parents: 8370
diff changeset
271 u_char info[128]; /* for debug */
8224
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parents:
diff changeset
272 };
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diff changeset
273
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274
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275 typedef struct {
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276 ngx_log_t *log;
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277
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278 struct ngx_quic_secret_s *secret;
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279 struct ngx_quic_secret_s *next;
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280 uint64_t number;
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281 uint8_t num_len;
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282 uint32_t trunc;
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283 uint8_t flags;
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284 uint32_t version;
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285 ngx_str_t token;
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286 enum ssl_encryption_level_t level;
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287 ngx_uint_t error;
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288
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289 /* filled in by parser */
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290 ngx_buf_t *raw; /* udp datagram */
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291
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292 u_char *data; /* quic packet */
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293 size_t len;
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294
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295 /* cleartext fields */
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296 ngx_str_t odcid; /* retry packet tag */
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297 ngx_str_t dcid;
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298 ngx_str_t scid;
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299 uint64_t pn;
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300 u_char *plaintext;
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301 ngx_str_t payload; /* decrypted data */
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302
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303 unsigned need_ack:1;
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304 unsigned key_phase:1;
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305 unsigned key_update:1;
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306 } ngx_quic_header_t;
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307
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308
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309 u_char *ngx_quic_error_text(uint64_t error_code);
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310
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311 ngx_int_t ngx_quic_parse_long_header(ngx_quic_header_t *pkt);
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312 size_t ngx_quic_create_long_header(ngx_quic_header_t *pkt, u_char *out,
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313 size_t pkt_len, u_char **pnp);
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314
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315 ngx_int_t ngx_quic_parse_short_header(ngx_quic_header_t *pkt,
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316 ngx_str_t *dcid);
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317 size_t ngx_quic_create_short_header(ngx_quic_header_t *pkt, u_char *out,
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318 size_t pkt_len, u_char **pnp);
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319
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320 size_t ngx_quic_create_retry_itag(ngx_quic_header_t *pkt, u_char *out,
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321 u_char **start);
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322
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323 ngx_int_t ngx_quic_parse_initial_header(ngx_quic_header_t *pkt);
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324 ngx_int_t ngx_quic_parse_handshake_header(ngx_quic_header_t *pkt);
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325
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326 ssize_t ngx_quic_parse_frame(ngx_quic_header_t *pkt, u_char *start, u_char *end,
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327 ngx_quic_frame_t *frame);
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328 ssize_t ngx_quic_create_frame(u_char *p, ngx_quic_frame_t *f);
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329
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330 ssize_t ngx_quic_parse_ack_range(ngx_quic_header_t *pkt, u_char *start,
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331 u_char *end, uint64_t *gap, uint64_t *range);
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332
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333 ngx_int_t ngx_quic_parse_transport_params(u_char *p, u_char *end,
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334 ngx_quic_tp_t *tp, ngx_log_t *log);
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335 ssize_t ngx_quic_create_transport_params(u_char *p, u_char *end,
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336 ngx_quic_tp_t *tp);
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337
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338 #endif /* _NGX_EVENT_QUIC_WIRE_H_INCLUDED_ */