Mercurial > hg > nginx
annotate src/event/quic/ngx_event_quic_connection.h @ 8782:b3f6ad181df4 quic
QUIC: refactored CRYPTO and STREAM buffer ordering.
Generic function ngx_quic_order_bufs() is introduced. This function creates
and maintains a chain of buffers with holes. Holes are marked with b->sync
flag. Several buffers and holes in this chain may share the same underlying
memory buffer.
When processing STREAM frames with this function, frame data is copied only
once to the right place in the stream input chain. Previously data could
be copied twice. First when buffering an out-of-order frame data, and then
when filling stream buffer from ordered frame queue. Now there's only one
data chain for both tasks.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Tue, 25 May 2021 13:55:12 +0300 |
parents | 0bd1dd39a08b |
children | af33d1ef1c3c |
rev | line source |
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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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14 |
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15 /* #define NGX_QUIC_DEBUG_PACKETS */ /* dump packet contents */ |
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16 /* #define NGX_QUIC_DEBUG_FRAMES */ /* dump frames contents */ |
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17 /* #define NGX_QUIC_DEBUG_ALLOC */ /* log frames and bufs alloc */ |
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18 /* #define NGX_QUIC_DEBUG_CRYPTO */ |
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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 typedef struct ngx_quic_server_id_s ngx_quic_server_id_t; |
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22 typedef struct ngx_quic_client_id_s ngx_quic_client_id_t; |
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23 typedef struct ngx_quic_send_ctx_s ngx_quic_send_ctx_t; |
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24 typedef struct ngx_quic_socket_s ngx_quic_socket_t; |
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25 typedef struct ngx_quic_path_s ngx_quic_path_t; |
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26 typedef struct ngx_quic_keys_s ngx_quic_keys_t; |
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27 |
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28 #include <ngx_event_quic_transport.h> |
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29 #include <ngx_event_quic_protection.h> |
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30 #include <ngx_event_quic_frames.h> |
8747 | 31 #include <ngx_event_quic_migration.h> |
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32 #include <ngx_event_quic_connid.h> |
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33 #include <ngx_event_quic_streams.h> |
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34 #include <ngx_event_quic_ssl.h> |
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35 #include <ngx_event_quic_tokens.h> |
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36 #include <ngx_event_quic_ack.h> |
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37 #include <ngx_event_quic_output.h> |
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38 #include <ngx_event_quic_socket.h> |
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39 |
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40 |
8747 | 41 /* quic-recovery, section 6.2.2, kInitialRtt */ |
42 #define NGX_QUIC_INITIAL_RTT 333 /* ms */ | |
43 | |
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44 #define NGX_QUIC_UNSET_PN (uint64_t) -1 |
8747 | 45 |
46 #define NGX_QUIC_SEND_CTX_LAST (NGX_QUIC_ENCRYPTION_LAST - 1) | |
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47 |
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48 /* 0-RTT and 1-RTT data exist in the same packet number space, |
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49 * so we have 3 packet number spaces: |
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50 * |
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51 * 0 - Initial |
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52 * 1 - Handshake |
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53 * 2 - 0-RTT and 1-RTT |
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54 */ |
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55 #define ngx_quic_get_send_ctx(qc, level) \ |
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56 ((level) == ssl_encryption_initial) ? &((qc)->send_ctx[0]) \ |
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57 : (((level) == ssl_encryption_handshake) ? &((qc)->send_ctx[1]) \ |
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58 : &((qc)->send_ctx[2])) |
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59 |
8747 | 60 #define ngx_quic_get_connection(c) \ |
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61 (((c)->udp) ? (((ngx_quic_socket_t *)((c)->udp))->quic) : NULL) |
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62 |
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63 #define ngx_quic_get_socket(c) ((ngx_quic_socket_t *)((c)->udp)) |
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65 |
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66 struct ngx_quic_client_id_s { |
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67 ngx_queue_t queue; |
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68 uint64_t seqnum; |
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69 size_t len; |
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70 u_char id[NGX_QUIC_CID_LEN_MAX]; |
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71 u_char sr_token[NGX_QUIC_SR_TOKEN_LEN]; |
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72 ngx_uint_t refcnt; |
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73 }; |
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74 |
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75 |
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76 struct ngx_quic_server_id_s { |
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77 uint64_t seqnum; |
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78 size_t len; |
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79 u_char id[NGX_QUIC_CID_LEN_MAX]; |
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80 }; |
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81 |
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82 |
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83 struct ngx_quic_path_s { |
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84 ngx_queue_t queue; |
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85 struct sockaddr *sockaddr; |
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86 socklen_t socklen; |
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87 ngx_uint_t state; |
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88 ngx_msec_t expires; |
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89 ngx_uint_t tries; |
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90 off_t sent; |
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91 off_t received; |
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92 u_char challenge1[8]; |
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93 u_char challenge2[8]; |
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94 ngx_uint_t refcnt; |
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95 uint64_t seqnum; |
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96 time_t validated_at; |
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97 ngx_str_t addr_text; |
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98 u_char text[NGX_SOCKADDR_STRLEN]; |
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99 }; |
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100 |
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101 |
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102 struct ngx_quic_socket_s { |
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103 ngx_udp_connection_t udp; |
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104 ngx_quic_connection_t *quic; |
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105 ngx_queue_t queue; |
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106 |
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107 ngx_quic_server_id_t sid; |
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108 |
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109 ngx_quic_path_t *path; |
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110 ngx_quic_client_id_t *cid; |
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111 }; |
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112 |
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113 |
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114 typedef struct { |
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115 ngx_rbtree_t tree; |
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116 ngx_rbtree_node_t sentinel; |
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117 |
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118 uint64_t received; |
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119 uint64_t sent; |
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120 uint64_t recv_max_data; |
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121 uint64_t send_max_data; |
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122 |
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123 uint64_t server_max_streams_uni; |
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124 uint64_t server_max_streams_bidi; |
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125 uint64_t server_streams_uni; |
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126 uint64_t server_streams_bidi; |
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127 |
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128 uint64_t client_max_streams_uni; |
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129 uint64_t client_max_streams_bidi; |
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130 uint64_t client_streams_uni; |
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131 uint64_t client_streams_bidi; |
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132 } ngx_quic_streams_t; |
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133 |
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134 |
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135 typedef struct { |
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136 size_t in_flight; |
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137 size_t window; |
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138 size_t ssthresh; |
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139 ngx_msec_t recovery_start; |
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140 } ngx_quic_congestion_t; |
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141 |
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142 |
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143 /* |
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144 * 12.3. Packet Numbers |
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145 * |
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146 * Conceptually, a packet number space is the context in which a packet |
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147 * can be processed and acknowledged. Initial packets can only be sent |
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148 * with Initial packet protection keys and acknowledged in packets which |
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149 * are also Initial packets. |
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150 */ |
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151 struct ngx_quic_send_ctx_s { |
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152 enum ssl_encryption_level_t level; |
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153 |
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154 ngx_chain_t *crypto; |
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155 uint64_t crypto_received; |
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156 uint64_t crypto_sent; |
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157 |
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158 uint64_t pnum; /* to be sent */ |
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159 uint64_t largest_ack; /* received from peer */ |
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160 uint64_t largest_pn; /* received from peer */ |
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161 |
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162 ngx_queue_t frames; |
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163 ngx_queue_t sent; |
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164 |
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165 uint64_t pending_ack; /* non sent ack-eliciting */ |
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166 uint64_t largest_range; |
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167 uint64_t first_range; |
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168 ngx_msec_t largest_received; |
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169 ngx_msec_t ack_delay_start; |
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170 ngx_uint_t nranges; |
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171 ngx_quic_ack_range_t ranges[NGX_QUIC_MAX_RANGES]; |
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172 ngx_uint_t send_ack; |
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173 }; |
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174 |
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175 |
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176 struct ngx_quic_connection_s { |
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177 uint32_t version; |
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178 |
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179 ngx_quic_socket_t *socket; |
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180 ngx_quic_socket_t *backup; |
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181 |
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182 ngx_queue_t sockets; |
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183 ngx_queue_t paths; |
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184 ngx_queue_t client_ids; |
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185 ngx_queue_t free_sockets; |
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186 ngx_queue_t free_paths; |
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187 ngx_queue_t free_client_ids; |
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188 |
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189 ngx_uint_t nsockets; |
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190 ngx_uint_t nclient_ids; |
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191 uint64_t max_retired_seqnum; |
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192 uint64_t client_seqnum; |
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193 uint64_t server_seqnum; |
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194 uint64_t path_seqnum; |
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195 |
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196 ngx_uint_t client_tp_done; |
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197 ngx_quic_tp_t tp; |
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198 ngx_quic_tp_t ctp; |
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199 |
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200 ngx_quic_send_ctx_t send_ctx[NGX_QUIC_SEND_CTX_LAST]; |
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201 |
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202 ngx_quic_keys_t *keys; |
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203 |
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204 ngx_quic_conf_t *conf; |
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205 |
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206 ngx_event_t push; |
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207 ngx_event_t pto; |
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208 ngx_event_t close; |
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209 ngx_event_t path_validation; |
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210 ngx_msec_t last_cc; |
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211 |
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212 ngx_msec_t latest_rtt; |
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213 ngx_msec_t avg_rtt; |
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214 ngx_msec_t min_rtt; |
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215 ngx_msec_t rttvar; |
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216 |
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217 ngx_uint_t pto_count; |
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218 |
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219 ngx_queue_t free_frames; |
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220 ngx_chain_t *free_bufs; |
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221 ngx_buf_t *free_shadow_bufs; |
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222 |
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223 #ifdef NGX_QUIC_DEBUG_ALLOC |
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224 ngx_uint_t nframes; |
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225 ngx_uint_t nbufs; |
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226 #endif |
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227 |
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228 ngx_quic_streams_t streams; |
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229 ngx_quic_congestion_t congestion; |
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230 |
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231 ngx_uint_t error; |
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232 enum ssl_encryption_level_t error_level; |
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233 ngx_uint_t error_ftype; |
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234 const char *error_reason; |
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235 |
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236 ngx_uint_t shutdown_code; |
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237 const char *shutdown_reason; |
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238 |
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239 unsigned error_app:1; |
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240 unsigned send_timer_set:1; |
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241 unsigned closing:1; |
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242 unsigned shutdown:1; |
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243 unsigned draining:1; |
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244 unsigned key_phase:1; |
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245 unsigned validated:1; |
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246 }; |
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247 |
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248 |
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249 ngx_int_t ngx_quic_apply_transport_params(ngx_connection_t *c, |
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250 ngx_quic_tp_t *ctp); |
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251 void ngx_quic_discard_ctx(ngx_connection_t *c, |
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252 enum ssl_encryption_level_t level); |
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253 void ngx_quic_close_connection(ngx_connection_t *c, ngx_int_t rc); |
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254 void ngx_quic_shutdown_quic(ngx_connection_t *c); |
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255 |
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256 #if (NGX_DEBUG) |
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257 void ngx_quic_connstate_dbg(ngx_connection_t *c); |
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258 #else |
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259 #define ngx_quic_connstate_dbg(c) |
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260 #endif |
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261 |
8747 | 262 #endif /* _NGX_EVENT_QUIC_CONNECTION_H_INCLUDED_ */ |