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annotate src/event/ngx_event_quic_transport.h @ 8236:d3b26c3bea22 quic

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Added parsing of STREAMS BLOCKED frames. While there, added hex prefix for debug to avoid frame type confusion.
author Vladimir Homutov <vl@nginx.com>
date Thu, 19 Mar 2020 11:15:43 +0300
parents 78540e2160d0
children ff540f13d95d
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8224
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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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5
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6
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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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9
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10
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11 #include <ngx_event_openssl.h>
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12
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13
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14 /* 17.2. Long Header Packets */
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15 #define NGX_QUIC_PKT_LONG 0x80
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16
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17 #define NGX_QUIC_PKT_INITIAL 0xC0
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18 #define NGX_QUIC_PKT_HANDSHAKE 0xE0
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19
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20 /* 12.4. Frames and Frame Types */
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21 #define NGX_QUIC_FT_PADDING 0x00
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22 #define NGX_QUIC_FT_PING 0x01
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23 #define NGX_QUIC_FT_ACK 0x02
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24 #define NGX_QUIC_FT_ACK_ECN 0x03
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25 #define NGX_QUIC_FT_RESET_STREAM 0x04
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26 #define NGX_QUIC_FT_STOP_SENDING 0x05
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27 #define NGX_QUIC_FT_CRYPTO 0x06
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28 #define NGX_QUIC_FT_NEW_TOKEN 0x07
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29 #define NGX_QUIC_FT_STREAM0 0x08
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30 #define NGX_QUIC_FT_STREAM1 0x09
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31 #define NGX_QUIC_FT_STREAM2 0x0A
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32 #define NGX_QUIC_FT_STREAM3 0x0B
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33 #define NGX_QUIC_FT_STREAM4 0x0C
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34 #define NGX_QUIC_FT_STREAM5 0x0D
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35 #define NGX_QUIC_FT_STREAM6 0x0E
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36 #define NGX_QUIC_FT_STREAM7 0x0F
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37 #define NGX_QUIC_FT_MAX_DATA 0x10
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38 #define NGX_QUIC_FT_MAX_STREAM_DATA 0x11
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39 #define NGX_QUIC_FT_MAX_STREAMS 0x12
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40 #define NGX_QUIC_FT_MAX_STREAMS2 0x13 // XXX
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41 #define NGX_QUIC_FT_DATA_BLOCKED 0x14
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42 #define NGX_QUIC_FT_STREAM_DATA_BLOCKED 0x15
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43 #define NGX_QUIC_FT_STREAMS_BLOCKED 0x16
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44 #define NGX_QUIC_FT_STREAMS_BLOCKED2 0x17 // XXX
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45 #define NGX_QUIC_FT_NEW_CONNECTION_ID 0x18
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46 #define NGX_QUIC_FT_RETIRE_CONNECTION_ID 0x19
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47 #define NGX_QUIC_FT_PATH_CHALLENGE 0x1A
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48 #define NGX_QUIC_FT_PATH_RESPONSE 0x1B
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49 #define NGX_QUIC_FT_CONNECTION_CLOSE 0x1C
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50 #define NGX_QUIC_FT_CONNECTION_CLOSE2 0x1D // XXX
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51 #define NGX_QUIC_FT_HANDSHAKE_DONE 0x1E
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52
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53 /* 22.4. QUIC Transport Error Codes Registry */
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54 #define NGX_QUIC_ERR_NO_ERROR 0x00
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55 #define NGX_QUIC_ERR_INTERNAL_ERROR 0x01
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56 #define NGX_QUIC_ERR_SERVER_BUSY 0x02
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57 #define NGX_QUIC_ERR_FLOW_CONTROL_ERROR 0x03
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58 #define NGX_QUIC_ERR_STREAM_LIMIT_ERROR 0x04
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59 #define NGX_QUIC_ERR_STREAM_STATE_ERROR 0x05
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60 #define NGX_QUIC_ERR_FINAL_SIZE_ERROR 0x06
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61 #define NGX_QUIC_ERR_FRAME_ENCODING_ERROR 0x07
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62 #define NGX_QUIC_ERR_TRANSPORT_PARAMETER_ERROR 0x08
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63 #define NGX_QUIC_ERR_CONNECTION_ID_LIMIT_ERROR 0x09
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64 #define NGX_QUIC_ERR_PROTOCOL_VIOLATION 0x0A
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65 #define NGX_QUIC_ERR_INVALID_TOKEN 0x0B
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66 /* 0xC is not defined */
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67 #define NGX_QUIC_ERR_CRYPTO_BUFFER_EXCEEDED 0x0D
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68 #define NGX_QUIC_ERR_CRYPTO_ERROR 0x10
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69
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70 #define NGX_QUIC_ERR_LAST NGX_QUIC_ERR_CRYPTO_ERROR
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71
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73 typedef struct {
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74 ngx_uint_t pn;
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75 uint64_t largest;
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76 uint64_t delay;
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77 uint64_t range_count;
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78 uint64_t first_range;
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79 uint64_t ranges[20];
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80 /* TODO: ecn counts */
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81 } ngx_quic_ack_frame_t;
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82
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83
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84 typedef struct {
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85 size_t offset;
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86 size_t len;
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87 u_char *data;
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88 } ngx_quic_crypto_frame_t;
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89
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90
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91 typedef struct {
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92 uint64_t seqnum;
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93 uint64_t retire;
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94 uint64_t len;
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95 u_char cid[20];
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96 u_char srt[16];
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97 } ngx_quic_new_conn_id_frame_t;
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98
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99
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100 typedef struct {
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101 uint8_t type;
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102 uint64_t stream_id;
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103 uint64_t offset;
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104 uint64_t length;
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105 unsigned off:1;
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106 unsigned len:1;
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107 unsigned fin:1;
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108 u_char *data;
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109 } ngx_quic_stream_frame_t;
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110
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111
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112 typedef struct {
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113 uint64_t error_code;
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114 uint64_t frame_type;
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115 ngx_str_t reason;
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116 } ngx_quic_close_frame_t;
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117
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118
8231
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119 typedef struct {
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120 uint64_t id;
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121 uint64_t error_code;
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122 uint64_t final_size;
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123 } ngx_quic_reset_stream_frame_t;
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124
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125
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126 typedef struct {
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127 uint64_t id;
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128 uint64_t error_code;
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129 } ngx_quic_stop_sending_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 limit;
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134 ngx_uint_t bidi; /* unsigned: bidi:1 */
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135 } ngx_quic_streams_blocked_frame_t;
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136
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137
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138 typedef struct ngx_quic_frame_s ngx_quic_frame_t;
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139
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140 struct ngx_quic_frame_s {
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141 ngx_uint_t type;
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142 enum ssl_encryption_level_t level;
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143 ngx_quic_frame_t *next;
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144 union {
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145 ngx_quic_ack_frame_t ack;
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146 ngx_quic_crypto_frame_t crypto;
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147 ngx_quic_new_conn_id_frame_t ncid;
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148 ngx_quic_stream_frame_t stream;
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149 ngx_quic_close_frame_t close;
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150 ngx_quic_reset_stream_frame_t reset_stream;
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151 ngx_quic_stop_sending_frame_t stop_sending;
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152 ngx_quic_streams_blocked_frame_t streams_blocked;
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153 } u;
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154 u_char info[128]; // for debug
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155 };
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156
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157
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158 typedef struct {
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159 ngx_log_t *log;
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160
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161 struct ngx_quic_secret_s *secret;
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162 ngx_uint_t type;
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163 ngx_uint_t *number;
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164 ngx_uint_t flags;
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165 uint32_t version;
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166 ngx_str_t token;
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167 enum ssl_encryption_level_t level;
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168
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169 /* filled in by parser */
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170 ngx_buf_t *raw; /* udp datagram */
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171
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172 u_char *data; /* quic packet */
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173 size_t len;
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174
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175 /* cleartext fields */
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176 ngx_str_t dcid;
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177 ngx_str_t scid;
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178 uint64_t pn;
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179 ngx_str_t payload; /* decrypted */
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180 } ngx_quic_header_t;
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181
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182
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183 u_char *ngx_quic_error_text(uint64_t error_code);
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184
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185 ngx_int_t ngx_quic_parse_long_header(ngx_quic_header_t *pkt);
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186 size_t ngx_quic_create_long_header(ngx_quic_header_t *pkt, ngx_str_t *out,
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187 size_t pkt_len, u_char **pnp);
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188
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189 ngx_int_t ngx_quic_parse_short_header(ngx_quic_header_t *pkt,
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190 ngx_str_t *dcid);
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191 ngx_int_t ngx_quic_parse_initial_header(ngx_quic_header_t *pkt);
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192 ngx_int_t ngx_quic_parse_handshake_header(ngx_quic_header_t *pkt);
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193
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194 ssize_t ngx_quic_parse_frame(u_char *start, u_char *end,
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195 ngx_quic_frame_t *frame);
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196 ssize_t ngx_quic_create_frame(u_char *p, u_char *end, ngx_quic_frame_t *f);
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197 size_t ngx_quic_frame_len(ngx_quic_frame_t *frame);
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198
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199 #endif /* _NGX_EVENT_QUIC_WIRE_H_INCLUDED_ */