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annotate src/event/quic/ngx_event_quic_connection.h @ 8737:76f476ce4d31 quic

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QUIC: distinct files for connection migration. The connection migration-related code from quic.c with dependencies is moved into separate file.
author Vladimir Homutov <vl@nginx.com>
date Wed, 31 Mar 2021 14:57:15 +0300
parents 714e9af983de
children c8bda5e1e662
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8736
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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 #include <ngx_event_quic_transport.h>
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14 #include <ngx_event_quic_protection.h>
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15
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16
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17 #define NGX_QUIC_SEND_CTX_LAST (NGX_QUIC_ENCRYPTION_LAST - 1)
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18
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19
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20 typedef struct ngx_quic_connection_s ngx_quic_connection_t;
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21
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22 /* 0-RTT and 1-RTT data exist in the same packet number space,
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23 * so we have 3 packet number spaces:
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24 *
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25 * 0 - Initial
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26 * 1 - Handshake
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27 * 2 - 0-RTT and 1-RTT
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28 */
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29 #define ngx_quic_get_send_ctx(qc, level) \
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30 ((level) == ssl_encryption_initial) ? &((qc)->send_ctx[0]) \
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31 : (((level) == ssl_encryption_handshake) ? &((qc)->send_ctx[1]) \
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32 : &((qc)->send_ctx[2]))
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33
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34
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35 typedef struct {
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36 ngx_queue_t queue;
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37 uint64_t seqnum;
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38 size_t len;
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39 u_char id[NGX_QUIC_CID_LEN_MAX];
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40 u_char sr_token[NGX_QUIC_SR_TOKEN_LEN];
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41 } ngx_quic_client_id_t;
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42
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43
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44 typedef struct {
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45 ngx_udp_connection_t udp;
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46 ngx_quic_connection_t *quic;
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47 ngx_queue_t queue;
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48 uint64_t seqnum;
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49 size_t len;
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50 u_char id[NGX_QUIC_CID_LEN_MAX];
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51 } ngx_quic_server_id_t;
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52
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53
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54 typedef struct {
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55 ngx_rbtree_t tree;
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56 ngx_rbtree_node_t sentinel;
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57
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58 uint64_t received;
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59 uint64_t sent;
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60 uint64_t recv_max_data;
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61 uint64_t send_max_data;
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62
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63 uint64_t server_max_streams_uni;
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64 uint64_t server_max_streams_bidi;
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65 uint64_t server_streams_uni;
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66 uint64_t server_streams_bidi;
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67
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68 uint64_t client_max_streams_uni;
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69 uint64_t client_max_streams_bidi;
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70 uint64_t client_streams_uni;
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71 uint64_t client_streams_bidi;
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72 } ngx_quic_streams_t;
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73
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74
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75 typedef struct {
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76 size_t in_flight;
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77 size_t window;
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78 size_t ssthresh;
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79 ngx_msec_t recovery_start;
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80 } ngx_quic_congestion_t;
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81
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82
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83 /*
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84 * 12.3. Packet Numbers
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85 *
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86 * Conceptually, a packet number space is the context in which a packet
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87 * can be processed and acknowledged. Initial packets can only be sent
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88 * with Initial packet protection keys and acknowledged in packets which
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89 * are also Initial packets.
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90 */
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91 typedef struct {
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92 enum ssl_encryption_level_t level;
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93
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94 uint64_t pnum; /* to be sent */
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95 uint64_t largest_ack; /* received from peer */
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96 uint64_t largest_pn; /* received from peer */
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97
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98 ngx_queue_t frames;
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99 ngx_queue_t sent;
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100
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101 uint64_t pending_ack; /* non sent ack-eliciting */
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102 uint64_t largest_range;
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103 uint64_t first_range;
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104 ngx_msec_t largest_received;
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105 ngx_msec_t ack_delay_start;
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106 ngx_uint_t nranges;
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107 ngx_quic_ack_range_t ranges[NGX_QUIC_MAX_RANGES];
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108 ngx_uint_t send_ack;
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109 } ngx_quic_send_ctx_t;
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110
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111
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112 struct ngx_quic_connection_s {
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113 uint32_t version;
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114
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115 ngx_str_t scid; /* initial client ID */
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116 ngx_str_t dcid; /* server (our own) ID */
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117 ngx_str_t odcid; /* original server ID */
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118
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119 struct sockaddr *sockaddr;
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120 socklen_t socklen;
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121
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122 ngx_queue_t client_ids;
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123 ngx_queue_t server_ids;
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124 ngx_queue_t free_client_ids;
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125 ngx_queue_t free_server_ids;
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126 ngx_uint_t nclient_ids;
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127 ngx_uint_t nserver_ids;
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128 uint64_t max_retired_seqnum;
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129 uint64_t client_seqnum;
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130 uint64_t server_seqnum;
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131
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132 ngx_uint_t client_tp_done;
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133 ngx_quic_tp_t tp;
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134 ngx_quic_tp_t ctp;
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135
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136 ngx_quic_send_ctx_t send_ctx[NGX_QUIC_SEND_CTX_LAST];
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137
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138 ngx_quic_frames_stream_t crypto[NGX_QUIC_ENCRYPTION_LAST];
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139
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140 ngx_quic_keys_t *keys;
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141
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142 ngx_quic_conf_t *conf;
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143
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144 ngx_event_t push;
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145 ngx_event_t pto;
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146 ngx_event_t close;
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147 ngx_msec_t last_cc;
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148
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149 ngx_msec_t latest_rtt;
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150 ngx_msec_t avg_rtt;
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151 ngx_msec_t min_rtt;
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152 ngx_msec_t rttvar;
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153
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154 ngx_uint_t pto_count;
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155
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156 ngx_queue_t free_frames;
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157 ngx_chain_t *free_bufs;
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158 ngx_buf_t *free_shadow_bufs;
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159
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160 #ifdef NGX_QUIC_DEBUG_ALLOC
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161 ngx_uint_t nframes;
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162 ngx_uint_t nbufs;
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163 #endif
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164
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165 ngx_quic_streams_t streams;
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166 ngx_quic_congestion_t congestion;
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167 off_t received;
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168
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169 ngx_uint_t error;
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170 enum ssl_encryption_level_t error_level;
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171 ngx_uint_t error_ftype;
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172 const char *error_reason;
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173
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174 ngx_uint_t shutdown_code;
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175 const char *shutdown_reason;
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176
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177 unsigned error_app:1;
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178 unsigned send_timer_set:1;
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179 unsigned closing:1;
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180 unsigned shutdown:1;
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181 unsigned draining:1;
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182 unsigned key_phase:1;
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183 unsigned validated:1;
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184 };
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185
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186
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187 ngx_quic_frame_t *ngx_quic_alloc_frame(ngx_connection_t *c);
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188 void ngx_quic_queue_frame(ngx_quic_connection_t *qc, ngx_quic_frame_t *frame);
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189 void ngx_quic_close_connection(ngx_connection_t *c, ngx_int_t rc);
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190 ngx_msec_t ngx_quic_pto(ngx_connection_t *c, ngx_quic_send_ctx_t *ctx);
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191
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192 #endif