annotate src/event/ngx_event_quic_transport.h @ 8288:ebd5c71b9f02 quic

Got rid of memory allocation in decryption. Static buffers are used instead in functions where decryption takes place. The pkt->plaintext points to the beginning of a static buffer. The pkt->payload.data points to decrypted data actual start.
author Vladimir Homutov <vl@nginx.com>
date Thu, 26 Mar 2020 16:54:46 +0300
parents c7185bc5b4d9
children 64527245dbfe
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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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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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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 u_char *data;
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209 union {
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210 ngx_quic_ack_frame_t ack;
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211 ngx_quic_crypto_frame_t crypto;
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212 ngx_quic_new_conn_id_frame_t ncid;
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213 ngx_quic_stream_frame_t stream;
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214 ngx_quic_max_data_frame_t max_data;
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215 ngx_quic_close_frame_t close;
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216 ngx_quic_reset_stream_frame_t reset_stream;
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diff changeset
217 ngx_quic_stop_sending_frame_t stop_sending;
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218 ngx_quic_streams_blocked_frame_t streams_blocked;
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219 ngx_quic_max_streams_frame_t max_streams;
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220 ngx_quic_max_stream_data_frame_t max_stream_data;
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221 ngx_quic_data_blocked_frame_t data_blocked;
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222 ngx_quic_stream_data_blocked_frame_t stream_data_blocked;
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223 ngx_quic_retire_cid_frame_t retire_cid;
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224 ngx_quic_path_challenge_frame_t path_challenge;
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225 ngx_quic_path_challenge_frame_t path_response;
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226 } u;
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227 u_char info[128]; // for debug
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228 };
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229
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230
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231 typedef struct {
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232 ngx_log_t *log;
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233
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234 struct ngx_quic_secret_s *secret;
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235 ngx_uint_t type;
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diff changeset
236 ngx_uint_t *number;
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diff changeset
237 uint8_t flags;
8224
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diff changeset
238 uint32_t version;
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diff changeset
239 ngx_str_t token;
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diff changeset
240 enum ssl_encryption_level_t level;
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241
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242 /* filled in by parser */
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diff changeset
243 ngx_buf_t *raw; /* udp datagram */
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diff changeset
244
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diff changeset
245 u_char *data; /* quic packet */
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246 size_t len;
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247
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248 /* cleartext fields */
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diff changeset
249 ngx_str_t dcid;
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diff changeset
250 ngx_str_t scid;
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diff changeset
251 uint64_t pn;
8288
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diff changeset
252 u_char *plaintext;
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diff changeset
253 ngx_str_t payload; /* decrypted data */
8224
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254 } ngx_quic_header_t;
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255
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diff changeset
256
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diff changeset
257 u_char *ngx_quic_error_text(uint64_t error_code);
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258
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diff changeset
259 ngx_int_t ngx_quic_parse_long_header(ngx_quic_header_t *pkt);
8285
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parents: 8260
diff changeset
260 size_t ngx_quic_create_long_header(ngx_quic_header_t *pkt, u_char *out,
8224
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diff changeset
261 size_t pkt_len, u_char **pnp);
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diff changeset
262
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diff changeset
263 ngx_int_t ngx_quic_parse_short_header(ngx_quic_header_t *pkt,
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diff changeset
264 ngx_str_t *dcid);
8285
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parents: 8260
diff changeset
265 size_t ngx_quic_create_short_header(ngx_quic_header_t *pkt, u_char *out,
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diff changeset
266 size_t pkt_len, u_char **pnp);
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diff changeset
267
8224
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diff changeset
268 ngx_int_t ngx_quic_parse_initial_header(ngx_quic_header_t *pkt);
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269 ngx_int_t ngx_quic_parse_handshake_header(ngx_quic_header_t *pkt);
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diff changeset
270
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diff changeset
271 ssize_t ngx_quic_parse_frame(ngx_quic_header_t *pkt, u_char *start, u_char *end,
8224
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272 ngx_quic_frame_t *frame);
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273 ssize_t ngx_quic_create_frame(u_char *p, u_char *end, ngx_quic_frame_t *f);
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274
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275 ngx_int_t ngx_quic_parse_transport_params(u_char *p, u_char *end,
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276 ngx_quic_tp_t *tp, ngx_log_t *log);
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277 ssize_t ngx_quic_create_transport_params(u_char *p, u_char *end,
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278 ngx_quic_tp_t *tp);
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279
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280 #endif /* _NGX_EVENT_QUIC_WIRE_H_INCLUDED_ */