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annotate src/event/quic/ngx_event_quic_connection.h @ 8736:714e9af983de quic

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QUIC: separate header for ngx_quic_connection_t.
author Vladimir Homutov <vl@nginx.com>
date Wed, 31 Mar 2021 14:56:16 +0300
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children 76f476ce4d31
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8736
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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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
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23 typedef struct {
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24 ngx_queue_t queue;
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25 uint64_t seqnum;
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26 size_t len;
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27 u_char id[NGX_QUIC_CID_LEN_MAX];
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28 u_char sr_token[NGX_QUIC_SR_TOKEN_LEN];
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29 } ngx_quic_client_id_t;
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30
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31
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32 typedef struct {
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33 ngx_udp_connection_t udp;
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34 ngx_quic_connection_t *quic;
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35 ngx_queue_t queue;
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36 uint64_t seqnum;
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37 size_t len;
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38 u_char id[NGX_QUIC_CID_LEN_MAX];
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39 } ngx_quic_server_id_t;
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40
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41
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42 typedef struct {
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43 ngx_rbtree_t tree;
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44 ngx_rbtree_node_t sentinel;
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45
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46 uint64_t received;
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47 uint64_t sent;
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48 uint64_t recv_max_data;
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49 uint64_t send_max_data;
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50
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51 uint64_t server_max_streams_uni;
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52 uint64_t server_max_streams_bidi;
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53 uint64_t server_streams_uni;
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54 uint64_t server_streams_bidi;
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55
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56 uint64_t client_max_streams_uni;
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57 uint64_t client_max_streams_bidi;
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58 uint64_t client_streams_uni;
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59 uint64_t client_streams_bidi;
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60 } ngx_quic_streams_t;
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61
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62
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63 typedef struct {
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64 size_t in_flight;
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65 size_t window;
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66 size_t ssthresh;
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67 ngx_msec_t recovery_start;
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68 } ngx_quic_congestion_t;
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69
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70
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71 /*
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72 * 12.3. Packet Numbers
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73 *
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74 * Conceptually, a packet number space is the context in which a packet
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75 * can be processed and acknowledged. Initial packets can only be sent
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76 * with Initial packet protection keys and acknowledged in packets which
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77 * are also Initial packets.
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78 */
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79 typedef struct {
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80 enum ssl_encryption_level_t level;
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81
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82 uint64_t pnum; /* to be sent */
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83 uint64_t largest_ack; /* received from peer */
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84 uint64_t largest_pn; /* received from peer */
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85
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86 ngx_queue_t frames;
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87 ngx_queue_t sent;
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88
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89 uint64_t pending_ack; /* non sent ack-eliciting */
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90 uint64_t largest_range;
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91 uint64_t first_range;
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92 ngx_msec_t largest_received;
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93 ngx_msec_t ack_delay_start;
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94 ngx_uint_t nranges;
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95 ngx_quic_ack_range_t ranges[NGX_QUIC_MAX_RANGES];
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96 ngx_uint_t send_ack;
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97 } ngx_quic_send_ctx_t;
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98
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99
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100 struct ngx_quic_connection_s {
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101 uint32_t version;
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102
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103 ngx_str_t scid; /* initial client ID */
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104 ngx_str_t dcid; /* server (our own) ID */
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105 ngx_str_t odcid; /* original server ID */
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106
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107 struct sockaddr *sockaddr;
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108 socklen_t socklen;
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109
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110 ngx_queue_t client_ids;
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111 ngx_queue_t server_ids;
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112 ngx_queue_t free_client_ids;
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113 ngx_queue_t free_server_ids;
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114 ngx_uint_t nclient_ids;
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115 ngx_uint_t nserver_ids;
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116 uint64_t max_retired_seqnum;
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117 uint64_t client_seqnum;
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118 uint64_t server_seqnum;
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119
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120 ngx_uint_t client_tp_done;
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121 ngx_quic_tp_t tp;
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122 ngx_quic_tp_t ctp;
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123
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124 ngx_quic_send_ctx_t send_ctx[NGX_QUIC_SEND_CTX_LAST];
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125
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126 ngx_quic_frames_stream_t crypto[NGX_QUIC_ENCRYPTION_LAST];
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127
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128 ngx_quic_keys_t *keys;
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129
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130 ngx_quic_conf_t *conf;
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131
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132 ngx_event_t push;
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133 ngx_event_t pto;
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134 ngx_event_t close;
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135 ngx_msec_t last_cc;
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136
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137 ngx_msec_t latest_rtt;
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138 ngx_msec_t avg_rtt;
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139 ngx_msec_t min_rtt;
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140 ngx_msec_t rttvar;
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141
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142 ngx_uint_t pto_count;
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143
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144 ngx_queue_t free_frames;
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145 ngx_chain_t *free_bufs;
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146 ngx_buf_t *free_shadow_bufs;
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147
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148 #ifdef NGX_QUIC_DEBUG_ALLOC
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149 ngx_uint_t nframes;
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150 ngx_uint_t nbufs;
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151 #endif
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152
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153 ngx_quic_streams_t streams;
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154 ngx_quic_congestion_t congestion;
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155 off_t received;
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156
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157 ngx_uint_t error;
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158 enum ssl_encryption_level_t error_level;
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159 ngx_uint_t error_ftype;
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160 const char *error_reason;
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161
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162 ngx_uint_t shutdown_code;
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163 const char *shutdown_reason;
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164
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165 unsigned error_app:1;
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166 unsigned send_timer_set:1;
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167 unsigned closing:1;
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168 unsigned shutdown:1;
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169 unsigned draining:1;
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170 unsigned key_phase:1;
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171 unsigned validated:1;
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172 };
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173
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174
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175 ngx_quic_frame_t *ngx_quic_alloc_frame(ngx_connection_t *c);
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176 void ngx_quic_queue_frame(ngx_quic_connection_t *qc, ngx_quic_frame_t *frame);
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177 void ngx_quic_close_connection(ngx_connection_t *c, ngx_int_t rc);
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178
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179 #endif