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annotate src/event/ngx_event_quic_transport.h @ 8260:f388c0ad3477 quic

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Added processing of client transport parameters. note: + parameters are available in SSL connection since they are obtained by ssl stack quote: During connection establishment, both endpoints make authenticated declarations of their transport parameters. These declarations are made unilaterally by each endpoint. and really, we send our parameters before we read client's. no handling of incoming parameters is made by this patch.
author Vladimir Homutov <vl@nginx.com>
date Sat, 21 Mar 2020 20:51:59 +0300
parents 085fd6e68367
children f85749b60e58
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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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11 #include <ngx_event_openssl.h>
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13
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14 #define ngx_quic_long_pkt(flags) ((flags) & 0x80) /* 17.2 */
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15 #define ngx_quic_short_pkt(flags) (((flags) & 0x80) == 0) /* 17.3 */
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17 /* Long packet types */
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18 #define NGX_QUIC_PKT_INITIAL 0xC0 /* 17.2.2 */
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19 #define NGX_QUIC_PKT_ZRTT 0xD0 /* 17.2.3 */
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20 #define NGX_QUIC_PKT_HANDSHAKE 0xE0 /* 17.2.4 */
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21 #define NGX_QUIC_PKT_RETRY 0xF0 /* 17.2.5 */
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22
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23 #define ngx_quic_pkt_in(flags) (((flags) & 0xF0) == NGX_QUIC_PKT_INITIAL)
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24 #define ngx_quic_pkt_zrtt(flags) (((flags) & 0xF0) == NGX_QUIC_PKT_ZRTT)
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25 #define ngx_quic_pkt_hs(flags) (((flags) & 0xF0) == NGX_QUIC_PKT_HANDSHAKE)
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26 #define ngx_quic_pkt_retry(flags) (((flags) & 0xF0) == NGX_QUIC_PKT_RETRY)
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28 /* 12.4. Frames and Frame Types */
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29 #define NGX_QUIC_FT_PADDING 0x00
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30 #define NGX_QUIC_FT_PING 0x01
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31 #define NGX_QUIC_FT_ACK 0x02
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32 #define NGX_QUIC_FT_ACK_ECN 0x03
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33 #define NGX_QUIC_FT_RESET_STREAM 0x04
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34 #define NGX_QUIC_FT_STOP_SENDING 0x05
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35 #define NGX_QUIC_FT_CRYPTO 0x06
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36 #define NGX_QUIC_FT_NEW_TOKEN 0x07
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37 #define NGX_QUIC_FT_STREAM0 0x08
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38 #define NGX_QUIC_FT_STREAM1 0x09
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39 #define NGX_QUIC_FT_STREAM2 0x0A
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40 #define NGX_QUIC_FT_STREAM3 0x0B
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41 #define NGX_QUIC_FT_STREAM4 0x0C
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42 #define NGX_QUIC_FT_STREAM5 0x0D
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43 #define NGX_QUIC_FT_STREAM6 0x0E
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44 #define NGX_QUIC_FT_STREAM7 0x0F
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45 #define NGX_QUIC_FT_MAX_DATA 0x10
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46 #define NGX_QUIC_FT_MAX_STREAM_DATA 0x11
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47 #define NGX_QUIC_FT_MAX_STREAMS 0x12
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48 #define NGX_QUIC_FT_MAX_STREAMS2 0x13
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49 #define NGX_QUIC_FT_DATA_BLOCKED 0x14
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50 #define NGX_QUIC_FT_STREAM_DATA_BLOCKED 0x15
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51 #define NGX_QUIC_FT_STREAMS_BLOCKED 0x16
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52 #define NGX_QUIC_FT_STREAMS_BLOCKED2 0x17
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53 #define NGX_QUIC_FT_NEW_CONNECTION_ID 0x18
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54 #define NGX_QUIC_FT_RETIRE_CONNECTION_ID 0x19
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55 #define NGX_QUIC_FT_PATH_CHALLENGE 0x1A
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56 #define NGX_QUIC_FT_PATH_RESPONSE 0x1B
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57 #define NGX_QUIC_FT_CONNECTION_CLOSE 0x1C
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58 #define NGX_QUIC_FT_CONNECTION_CLOSE2 0x1D
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59 #define NGX_QUIC_FT_HANDSHAKE_DONE 0x1E
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60
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61 /* 22.4. QUIC Transport Error Codes Registry */
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62 #define NGX_QUIC_ERR_NO_ERROR 0x00
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63 #define NGX_QUIC_ERR_INTERNAL_ERROR 0x01
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64 #define NGX_QUIC_ERR_SERVER_BUSY 0x02
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65 #define NGX_QUIC_ERR_FLOW_CONTROL_ERROR 0x03
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66 #define NGX_QUIC_ERR_STREAM_LIMIT_ERROR 0x04
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67 #define NGX_QUIC_ERR_STREAM_STATE_ERROR 0x05
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68 #define NGX_QUIC_ERR_FINAL_SIZE_ERROR 0x06
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69 #define NGX_QUIC_ERR_FRAME_ENCODING_ERROR 0x07
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70 #define NGX_QUIC_ERR_TRANSPORT_PARAMETER_ERROR 0x08
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71 #define NGX_QUIC_ERR_CONNECTION_ID_LIMIT_ERROR 0x09
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72 #define NGX_QUIC_ERR_PROTOCOL_VIOLATION 0x0A
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73 #define NGX_QUIC_ERR_INVALID_TOKEN 0x0B
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74 /* 0xC is not defined */
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75 #define NGX_QUIC_ERR_CRYPTO_BUFFER_EXCEEDED 0x0D
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76 /* 0xE is not defined */
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77 #define NGX_QUIC_ERR_CRYPTO_ERROR 0x10
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78
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79 #define NGX_QUIC_ERR_LAST NGX_QUIC_ERR_CRYPTO_ERROR
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80
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81 /* Transport parameters */
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82 #define NGX_QUIC_TP_ORIGINAL_CONNECTION_ID 0x00
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83 #define NGX_QUIC_TP_MAX_IDLE_TIMEOUT 0x01
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84 #define NGX_QUIC_TP_STATELESS_RESET_TOKEN 0x02
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85 #define NGX_QUIC_TP_MAX_PACKET_SIZE 0x03
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86 #define NGX_QUIC_TP_INITIAL_MAX_DATA 0x04
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87 #define NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL 0x05
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88 #define NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE 0x06
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89 #define NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI 0x07
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90 #define NGX_QUIC_TP_INITIAL_MAX_STREAMS_BIDI 0x08
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91 #define NGX_QUIC_TP_INITIAL_MAX_STREAMS_UNI 0x09
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92 #define NGX_QUIC_TP_ACK_DELAY_EXPONENT 0x0A
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93 #define NGX_QUIC_TP_MAX_ACK_DELAY 0x0B
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94 #define NGX_QUIC_TP_DISABLE_ACTIVE_MIGRATION 0x0C
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95 #define NGX_QUIC_TP_PREFERRED_ADDRESS 0x0D
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96 #define NGX_QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT 0x0E
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97
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99 typedef struct {
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100 ngx_uint_t pn;
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101 uint64_t largest;
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102 uint64_t delay;
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103 uint64_t range_count;
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104 uint64_t first_range;
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105 uint64_t ranges[20];
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106 /* TODO: ecn counts */
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107 } ngx_quic_ack_frame_t;
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108
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109
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110 typedef struct {
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111 uint64_t offset;
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112 uint64_t len;
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113 u_char *data;
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114 } ngx_quic_crypto_frame_t;
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115
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116
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117 typedef struct {
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118 uint64_t seqnum;
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119 uint64_t retire;
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120 uint8_t len;
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121 u_char cid[20];
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122 u_char srt[16];
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123 } ngx_quic_new_conn_id_frame_t;
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124
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126 typedef struct {
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127 uint8_t type;
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128 uint64_t stream_id;
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129 uint64_t offset;
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130 uint64_t length;
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131 unsigned off:1;
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132 unsigned len:1;
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133 unsigned fin:1;
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134 u_char *data;
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135 } ngx_quic_stream_frame_t;
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136
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137
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138 typedef struct {
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139 uint64_t max_data;
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140 } ngx_quic_max_data_frame_t;
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141
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142
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143 typedef struct {
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144 uint64_t error_code;
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145 uint64_t frame_type;
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146 ngx_str_t reason;
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147 } ngx_quic_close_frame_t;
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148
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149
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150 typedef struct {
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151 uint64_t id;
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152 uint64_t error_code;
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153 uint64_t final_size;
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154 } ngx_quic_reset_stream_frame_t;
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155
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156
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157 typedef struct {
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158 uint64_t id;
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159 uint64_t error_code;
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160 } ngx_quic_stop_sending_frame_t;
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161
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162
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163 typedef struct {
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164 uint64_t limit;
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165 ngx_uint_t bidi; /* unsigned: bidi:1 */
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166 } ngx_quic_streams_blocked_frame_t;
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167
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168
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169 typedef struct {
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170 uint64_t limit;
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171 ngx_uint_t bidi; /* unsigned: bidi:1 */
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172 } ngx_quic_max_streams_frame_t;
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173
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174
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175 typedef struct {
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176 uint64_t id;
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177 uint64_t limit;
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178 } ngx_quic_max_stream_data_frame_t;
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179
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180
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181 typedef struct {
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182 uint64_t limit;
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183 } ngx_quic_data_blocked_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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188 uint64_t limit;
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189 } ngx_quic_stream_data_blocked_frame_t;
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190
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191
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192 typedef struct {
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193 uint64_t sequence_number;
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194 } ngx_quic_retire_cid_frame_t;
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195
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196
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197 typedef struct {
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198 u_char data[8];
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199 } ngx_quic_path_challenge_frame_t;
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200
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201
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202 typedef struct ngx_quic_frame_s ngx_quic_frame_t;
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203
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204 struct ngx_quic_frame_s {
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205 ngx_uint_t type;
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206 enum ssl_encryption_level_t level;
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207 ngx_quic_frame_t *next;
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208 union {
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209 ngx_quic_ack_frame_t ack;
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210 ngx_quic_crypto_frame_t crypto;
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211 ngx_quic_new_conn_id_frame_t ncid;
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212 ngx_quic_stream_frame_t stream;
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213 ngx_quic_max_data_frame_t max_data;
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214 ngx_quic_close_frame_t close;
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215 ngx_quic_reset_stream_frame_t reset_stream;
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216 ngx_quic_stop_sending_frame_t stop_sending;
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217 ngx_quic_streams_blocked_frame_t streams_blocked;
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218 ngx_quic_max_streams_frame_t max_streams;
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219 ngx_quic_max_stream_data_frame_t max_stream_data;
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220 ngx_quic_data_blocked_frame_t data_blocked;
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221 ngx_quic_stream_data_blocked_frame_t stream_data_blocked;
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222 ngx_quic_retire_cid_frame_t retire_cid;
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223 ngx_quic_path_challenge_frame_t path_challenge;
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224 ngx_quic_path_challenge_frame_t path_response;
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225 } u;
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226 u_char info[128]; // for debug
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227 };
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228
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229
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230 typedef struct {
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231 ngx_log_t *log;
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232
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233 struct ngx_quic_secret_s *secret;
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234 ngx_uint_t type;
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235 ngx_uint_t *number;
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236 uint8_t flags;
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diff changeset
237 uint32_t version;
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238 ngx_str_t token;
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diff changeset
239 enum ssl_encryption_level_t level;
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240
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241 /* filled in by parser */
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diff changeset
242 ngx_buf_t *raw; /* udp datagram */
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243
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diff changeset
244 u_char *data; /* quic packet */
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diff changeset
245 size_t len;
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diff changeset
246
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diff changeset
247 /* cleartext fields */
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diff changeset
248 ngx_str_t dcid;
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diff changeset
249 ngx_str_t scid;
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diff changeset
250 uint64_t pn;
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diff changeset
251 ngx_str_t payload; /* decrypted */
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diff changeset
252 } ngx_quic_header_t;
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253
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254
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diff changeset
255 u_char *ngx_quic_error_text(uint64_t error_code);
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diff changeset
256
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parents:
diff changeset
257 ngx_int_t ngx_quic_parse_long_header(ngx_quic_header_t *pkt);
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diff changeset
258 size_t ngx_quic_create_long_header(ngx_quic_header_t *pkt, ngx_str_t *out,
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parents:
diff changeset
259 size_t pkt_len, u_char **pnp);
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diff changeset
260
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diff changeset
261 ngx_int_t ngx_quic_parse_short_header(ngx_quic_header_t *pkt,
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diff changeset
262 ngx_str_t *dcid);
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diff changeset
263 ngx_int_t ngx_quic_parse_initial_header(ngx_quic_header_t *pkt);
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diff changeset
264 ngx_int_t ngx_quic_parse_handshake_header(ngx_quic_header_t *pkt);
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265
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diff changeset
266 ssize_t ngx_quic_parse_frame(ngx_quic_header_t *pkt, u_char *start, u_char *end,
8224
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267 ngx_quic_frame_t *frame);
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diff changeset
268 ssize_t ngx_quic_create_frame(u_char *p, u_char *end, ngx_quic_frame_t *f);
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269
8260
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diff changeset
270 ngx_int_t ngx_quic_parse_transport_params(u_char *p, u_char *end,
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diff changeset
271 ngx_quic_tp_t *tp, ngx_log_t *log);
8247
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272 ssize_t ngx_quic_create_transport_params(u_char *p, u_char *end,
e9891e8ee975 Configurable transport parameters.
Vladimir Homutov <vl@nginx.com>
parents: 8245
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273 ngx_quic_tp_t *tp);
e9891e8ee975 Configurable transport parameters.
Vladimir Homutov <vl@nginx.com>
parents: 8245
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274
8224
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
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275 #endif /* _NGX_EVENT_QUIC_WIRE_H_INCLUDED_ */