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annotate src/event/quic/ngx_event_quic_connection.h @ 8753:46161c610919 quic

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QUIC: separate files for SSL library interfaces.
author Vladimir Homutov <vl@nginx.com>
date Wed, 14 Apr 2021 14:47:04 +0300
parents e19723c40d28
children 915c2f7092ed
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1 /*
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2 * Copyright (C) Nginx, Inc.
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3 */
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4
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5
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6 #ifndef _NGX_EVENT_QUIC_CONNECTION_H_INCLUDED_
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7 #define _NGX_EVENT_QUIC_CONNECTION_H_INCLUDED_
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8
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9
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10 #include <ngx_config.h>
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11 #include <ngx_core.h>
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12 #include <ngx_event.h>
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13
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14 #include <ngx_event_quic_transport.h>
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15 #include <ngx_event_quic_protection.h>
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16
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17 typedef struct ngx_quic_connection_s ngx_quic_connection_t;
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18 typedef struct ngx_quic_send_ctx_s ngx_quic_send_ctx_t;
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19
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20 #include <ngx_event_quic_frames.h>
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21 #include <ngx_event_quic_migration.h>
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22 #include <ngx_event_quic_connid.h>
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23 #include <ngx_event_quic_streams.h>
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24 #include <ngx_event_quic_ssl.h>
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25 #include <ngx_event_quic_tokens.h>
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26 #include <ngx_event_quic_ack.h>
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27 #include <ngx_event_quic_output.h>
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29
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30 /* quic-recovery, section 6.2.2, kInitialRtt */
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31 #define NGX_QUIC_INITIAL_RTT 333 /* ms */
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32
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33 #define NGX_QUIC_UNSET_PN (uint64_t) -1
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34
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35 #define NGX_QUIC_SEND_CTX_LAST (NGX_QUIC_ENCRYPTION_LAST - 1)
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37 /* 0-RTT and 1-RTT data exist in the same packet number space,
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38 * so we have 3 packet number spaces:
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39 *
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40 * 0 - Initial
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41 * 1 - Handshake
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42 * 2 - 0-RTT and 1-RTT
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43 */
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44 #define ngx_quic_get_send_ctx(qc, level) \
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45 ((level) == ssl_encryption_initial) ? &((qc)->send_ctx[0]) \
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46 : (((level) == ssl_encryption_handshake) ? &((qc)->send_ctx[1]) \
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47 : &((qc)->send_ctx[2]))
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48
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49 #define ngx_quic_get_connection(c) \
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50 (((c)->udp) ? (((ngx_quic_server_id_t *)((c)->udp))->quic) : NULL)
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51
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52
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53 typedef struct {
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54 ngx_queue_t queue;
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55 uint64_t seqnum;
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56 size_t len;
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57 u_char id[NGX_QUIC_CID_LEN_MAX];
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58 u_char sr_token[NGX_QUIC_SR_TOKEN_LEN];
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59 } ngx_quic_client_id_t;
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60
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61
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62 typedef struct {
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63 ngx_udp_connection_t udp;
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64 ngx_quic_connection_t *quic;
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65 ngx_queue_t queue;
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66 uint64_t seqnum;
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67 size_t len;
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68 u_char id[NGX_QUIC_CID_LEN_MAX];
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69 } ngx_quic_server_id_t;
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70
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71
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72 typedef struct {
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73 ngx_rbtree_t tree;
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74 ngx_rbtree_node_t sentinel;
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75
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76 uint64_t received;
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77 uint64_t sent;
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78 uint64_t recv_max_data;
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79 uint64_t send_max_data;
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80
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81 uint64_t server_max_streams_uni;
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82 uint64_t server_max_streams_bidi;
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83 uint64_t server_streams_uni;
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84 uint64_t server_streams_bidi;
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85
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86 uint64_t client_max_streams_uni;
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87 uint64_t client_max_streams_bidi;
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88 uint64_t client_streams_uni;
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89 uint64_t client_streams_bidi;
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90 } ngx_quic_streams_t;
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91
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92
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93 typedef struct {
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94 size_t in_flight;
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95 size_t window;
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96 size_t ssthresh;
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97 ngx_msec_t recovery_start;
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98 } ngx_quic_congestion_t;
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99
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100
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101 /*
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102 * 12.3. Packet Numbers
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103 *
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104 * Conceptually, a packet number space is the context in which a packet
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105 * can be processed and acknowledged. Initial packets can only be sent
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106 * with Initial packet protection keys and acknowledged in packets which
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107 * are also Initial packets.
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108 */
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109 struct ngx_quic_send_ctx_s {
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110 enum ssl_encryption_level_t level;
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111
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112 uint64_t pnum; /* to be sent */
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113 uint64_t largest_ack; /* received from peer */
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114 uint64_t largest_pn; /* received from peer */
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115
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116 ngx_queue_t frames;
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117 ngx_queue_t sent;
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118
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119 uint64_t pending_ack; /* non sent ack-eliciting */
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120 uint64_t largest_range;
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121 uint64_t first_range;
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122 ngx_msec_t largest_received;
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123 ngx_msec_t ack_delay_start;
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124 ngx_uint_t nranges;
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125 ngx_quic_ack_range_t ranges[NGX_QUIC_MAX_RANGES];
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126 ngx_uint_t send_ack;
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127 };
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128
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129
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130 struct ngx_quic_connection_s {
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131 uint32_t version;
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132
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133 ngx_str_t scid; /* initial client ID */
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134 ngx_str_t dcid; /* server (our own) ID */
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135 ngx_str_t odcid; /* original server ID */
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136
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137 struct sockaddr *sockaddr;
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138 socklen_t socklen;
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139
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140 ngx_queue_t client_ids;
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141 ngx_queue_t server_ids;
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142 ngx_queue_t free_client_ids;
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143 ngx_queue_t free_server_ids;
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144 ngx_uint_t nclient_ids;
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145 ngx_uint_t nserver_ids;
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146 uint64_t max_retired_seqnum;
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147 uint64_t client_seqnum;
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148 uint64_t server_seqnum;
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149
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150 ngx_uint_t client_tp_done;
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151 ngx_quic_tp_t tp;
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152 ngx_quic_tp_t ctp;
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153
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154 ngx_quic_send_ctx_t send_ctx[NGX_QUIC_SEND_CTX_LAST];
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155
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156 ngx_quic_frames_stream_t crypto[NGX_QUIC_ENCRYPTION_LAST];
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157
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158 ngx_quic_keys_t *keys;
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159
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160 ngx_quic_conf_t *conf;
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161
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162 ngx_event_t push;
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163 ngx_event_t pto;
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164 ngx_event_t close;
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165 ngx_msec_t last_cc;
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166
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167 ngx_msec_t latest_rtt;
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168 ngx_msec_t avg_rtt;
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169 ngx_msec_t min_rtt;
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170 ngx_msec_t rttvar;
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171
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172 ngx_uint_t pto_count;
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173
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174 ngx_queue_t free_frames;
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175 ngx_chain_t *free_bufs;
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176 ngx_buf_t *free_shadow_bufs;
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177
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178 #ifdef NGX_QUIC_DEBUG_ALLOC
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179 ngx_uint_t nframes;
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180 ngx_uint_t nbufs;
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181 #endif
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182
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183 ngx_quic_streams_t streams;
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184 ngx_quic_congestion_t congestion;
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185 off_t received;
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186
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187 ngx_uint_t error;
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188 enum ssl_encryption_level_t error_level;
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189 ngx_uint_t error_ftype;
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190 const char *error_reason;
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191
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192 ngx_uint_t shutdown_code;
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193 const char *shutdown_reason;
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194
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195 unsigned error_app:1;
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196 unsigned send_timer_set:1;
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197 unsigned closing:1;
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198 unsigned shutdown:1;
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199 unsigned draining:1;
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200 unsigned key_phase:1;
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201 unsigned validated:1;
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202 };
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203
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204
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205 ngx_int_t ngx_quic_apply_transport_params(ngx_connection_t *c,
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206 ngx_quic_tp_t *ctp);
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207 void ngx_quic_discard_ctx(ngx_connection_t *c,
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208 enum ssl_encryption_level_t level);
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209 void ngx_quic_close_connection(ngx_connection_t *c, ngx_int_t rc);
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210 void ngx_quic_shutdown_quic(ngx_connection_t *c);
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211
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212
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213 /********************************* DEBUG *************************************/
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214
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215 #if (NGX_DEBUG)
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216 void ngx_quic_connstate_dbg(ngx_connection_t *c);
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217 #else
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218 #define ngx_quic_connstate_dbg(c)
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219 #endif
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220
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221
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222 /* #define NGX_QUIC_DEBUG_PACKETS */ /* dump packet contents */
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223 /* #define NGX_QUIC_DEBUG_FRAMES */ /* dump frames contents */
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224 /* #define NGX_QUIC_DEBUG_ALLOC */ /* log frames and bufs alloc */
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225 /* #define NGX_QUIC_DEBUG_CRYPTO */
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226
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227 #endif /* _NGX_EVENT_QUIC_CONNECTION_H_INCLUDED_ */