Mercurial > hg > nginx-quic
annotate src/event/quic/ngx_event_quic_connection.h @ 8547:ad046179eb91 quic
QUIC: handle EAGAIN properly on UDP sockets.
Previously, the error was ignored leading to unnecessary retransmits.
Now, unsent frames are returned into output queue, state is reset, and
timer is started for the next send attempt.
author | Vladimir Homutov <vl@nginx.com> |
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date | Wed, 28 Jul 2021 17:23:18 +0300 |
parents | 4715f3e669f1 |
children | fe919fd63b0b |
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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> |
8407 | 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 |
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41 /* RFC 9002, 6.2.2. Handshakes and New Paths: kInitialRtt */ |
8407 | 42 #define NGX_QUIC_INITIAL_RTT 333 /* ms */ |
43 | |
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44 #define NGX_QUIC_UNSET_PN (uint64_t) -1 |
8407 | 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 |
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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)) |
8407 | 64 |
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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 sent; |
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119 uint64_t recv_offset; |
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120 uint64_t recv_window; |
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121 uint64_t recv_last; |
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122 uint64_t recv_max_data; |
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123 uint64_t send_max_data; |
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124 |
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125 uint64_t server_max_streams_uni; |
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126 uint64_t server_max_streams_bidi; |
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127 uint64_t server_streams_uni; |
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128 uint64_t server_streams_bidi; |
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129 |
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130 uint64_t client_max_streams_uni; |
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131 uint64_t client_max_streams_bidi; |
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132 uint64_t client_streams_uni; |
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133 uint64_t client_streams_bidi; |
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134 } ngx_quic_streams_t; |
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135 |
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136 |
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137 typedef struct { |
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138 size_t in_flight; |
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139 size_t window; |
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140 size_t ssthresh; |
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141 ngx_msec_t recovery_start; |
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142 } ngx_quic_congestion_t; |
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143 |
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144 |
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145 /* |
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146 * RFC 9000, 12.3. Packet Numbers |
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147 * |
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148 * Conceptually, a packet number space is the context in which a packet |
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149 * can be processed and acknowledged. Initial packets can only be sent |
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150 * with Initial packet protection keys and acknowledged in packets that |
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151 * are also Initial packets. |
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152 */ |
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153 struct ngx_quic_send_ctx_s { |
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154 enum ssl_encryption_level_t level; |
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155 |
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156 ngx_chain_t *crypto; |
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157 uint64_t crypto_received; |
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158 uint64_t crypto_sent; |
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159 |
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160 uint64_t pnum; /* to be sent */ |
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161 uint64_t largest_ack; /* received from peer */ |
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162 uint64_t largest_pn; /* received from peer */ |
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163 |
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164 ngx_queue_t frames; /* generated frames */ |
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165 ngx_queue_t sending; /* frames assigned to pkt */ |
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166 ngx_queue_t sent; /* frames waiting ACK */ |
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167 |
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168 uint64_t pending_ack; /* non sent ack-eliciting */ |
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169 uint64_t largest_range; |
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170 uint64_t first_range; |
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171 ngx_msec_t largest_received; |
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172 ngx_msec_t ack_delay_start; |
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173 ngx_uint_t nranges; |
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174 ngx_quic_ack_range_t ranges[NGX_QUIC_MAX_RANGES]; |
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175 ngx_uint_t send_ack; |
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176 }; |
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177 |
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178 |
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179 struct ngx_quic_connection_s { |
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180 uint32_t version; |
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181 |
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182 ngx_quic_socket_t *socket; |
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183 ngx_quic_socket_t *backup; |
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184 |
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185 ngx_queue_t sockets; |
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186 ngx_queue_t paths; |
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187 ngx_queue_t client_ids; |
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188 ngx_queue_t free_sockets; |
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189 ngx_queue_t free_paths; |
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190 ngx_queue_t free_client_ids; |
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191 |
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192 ngx_uint_t nsockets; |
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193 ngx_uint_t nclient_ids; |
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194 uint64_t max_retired_seqnum; |
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195 uint64_t client_seqnum; |
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196 uint64_t server_seqnum; |
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197 uint64_t path_seqnum; |
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198 |
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199 ngx_uint_t client_tp_done; |
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200 ngx_quic_tp_t tp; |
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201 ngx_quic_tp_t ctp; |
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202 |
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203 ngx_quic_send_ctx_t send_ctx[NGX_QUIC_SEND_CTX_LAST]; |
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204 |
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205 ngx_quic_keys_t *keys; |
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206 |
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207 ngx_quic_conf_t *conf; |
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208 |
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209 ngx_event_t push; |
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210 ngx_event_t pto; |
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211 ngx_event_t close; |
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212 ngx_event_t path_validation; |
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213 ngx_msec_t last_cc; |
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214 |
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215 ngx_msec_t first_rtt; |
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216 ngx_msec_t latest_rtt; |
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217 ngx_msec_t avg_rtt; |
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218 ngx_msec_t min_rtt; |
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219 ngx_msec_t rttvar; |
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220 |
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221 ngx_uint_t pto_count; |
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222 |
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223 ngx_queue_t free_frames; |
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224 ngx_chain_t *free_bufs; |
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225 ngx_buf_t *free_shadow_bufs; |
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226 |
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227 #ifdef NGX_QUIC_DEBUG_ALLOC |
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228 ngx_uint_t nframes; |
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229 ngx_uint_t nbufs; |
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230 #endif |
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231 |
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232 ngx_quic_streams_t streams; |
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233 ngx_quic_congestion_t congestion; |
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234 |
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235 ngx_uint_t error; |
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236 enum ssl_encryption_level_t error_level; |
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237 ngx_uint_t error_ftype; |
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238 const char *error_reason; |
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239 |
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240 ngx_uint_t shutdown_code; |
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241 const char *shutdown_reason; |
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242 |
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243 unsigned error_app:1; |
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244 unsigned send_timer_set:1; |
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245 unsigned closing:1; |
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246 unsigned shutdown:1; |
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247 unsigned draining:1; |
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248 unsigned key_phase:1; |
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249 unsigned validated:1; |
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250 }; |
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251 |
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252 |
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253 ngx_int_t ngx_quic_apply_transport_params(ngx_connection_t *c, |
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254 ngx_quic_tp_t *ctp); |
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255 void ngx_quic_discard_ctx(ngx_connection_t *c, |
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256 enum ssl_encryption_level_t level); |
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257 void ngx_quic_close_connection(ngx_connection_t *c, ngx_int_t rc); |
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258 void ngx_quic_shutdown_quic(ngx_connection_t *c); |
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259 |
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260 #if (NGX_DEBUG) |
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261 void ngx_quic_connstate_dbg(ngx_connection_t *c); |
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262 #else |
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263 #define ngx_quic_connstate_dbg(c) |
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264 #endif |
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265 |
8407 | 266 #endif /* _NGX_EVENT_QUIC_CONNECTION_H_INCLUDED_ */ |