Mercurial > hg > nginx
annotate src/event/quic/ngx_event_quic_connection.h @ 8946:56dec0d4e5b1 quic
QUIC: avoid excessive buffer allocations in stream output.
Previously, when a few bytes were send to a QUIC stream by the application, a
4K buffer was allocated for these bytes. Then a STREAM frame was created and
that entire buffer was used as data for that frame. The frame with the buffer
were in use up until the frame was acked by client. Meanwhile, when more
bytes were send to the stream, more buffers were allocated and assigned as
data to newer STREAM frames. In this scenario most buffer memory is unused.
Now the unused part of the stream output buffer is available for further
stream output while earlier parts of the buffer are waiting to be acked.
This is achieved by splitting the output buffer.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Fri, 24 Dec 2021 18:13:51 +0300 |
parents | fb41e37ddeb0 |
children | fb811b6c76ee |
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> |
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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 */ |
8747 | 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)) |
8747 | 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_uint_t limited; /* unsigned limited:1; */ |
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89 ngx_msec_t expires; |
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90 ngx_msec_t last_seen; |
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91 ngx_uint_t tries; |
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92 off_t sent; |
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93 off_t received; |
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94 u_char challenge1[8]; |
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95 u_char challenge2[8]; |
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96 ngx_uint_t refcnt; |
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97 uint64_t seqnum; |
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98 ngx_str_t addr_text; |
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99 u_char text[NGX_SOCKADDR_STRLEN]; |
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100 }; |
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101 |
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102 |
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103 struct ngx_quic_socket_s { |
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104 ngx_udp_connection_t udp; |
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105 ngx_quic_connection_t *quic; |
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106 ngx_queue_t queue; |
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107 |
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108 ngx_quic_server_id_t sid; |
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109 |
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110 ngx_quic_path_t *path; |
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111 ngx_quic_client_id_t *cid; |
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112 }; |
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113 |
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114 |
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115 typedef struct { |
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116 ngx_rbtree_t tree; |
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117 ngx_rbtree_node_t sentinel; |
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118 ngx_queue_t uninitialized; |
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119 |
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120 uint64_t sent; |
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121 uint64_t recv_offset; |
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122 uint64_t recv_window; |
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123 uint64_t recv_last; |
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124 uint64_t recv_max_data; |
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125 uint64_t send_max_data; |
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126 |
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127 uint64_t server_max_streams_uni; |
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128 uint64_t server_max_streams_bidi; |
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129 uint64_t server_streams_uni; |
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130 uint64_t server_streams_bidi; |
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131 |
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132 uint64_t client_max_streams_uni; |
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133 uint64_t client_max_streams_bidi; |
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134 uint64_t client_streams_uni; |
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135 uint64_t client_streams_bidi; |
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136 |
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137 ngx_uint_t initialized; |
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138 /* unsigned initialized:1; */ |
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139 } ngx_quic_streams_t; |
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140 |
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141 |
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142 typedef struct { |
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143 size_t in_flight; |
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144 size_t window; |
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145 size_t ssthresh; |
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146 ngx_msec_t recovery_start; |
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147 } ngx_quic_congestion_t; |
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148 |
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149 |
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150 /* |
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151 * RFC 9000, 12.3. Packet Numbers |
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152 * |
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153 * Conceptually, a packet number space is the context in which a packet |
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154 * can be processed and acknowledged. Initial packets can only be sent |
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155 * with Initial packet protection keys and acknowledged in packets that |
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156 * are also Initial packets. |
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157 */ |
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158 struct ngx_quic_send_ctx_s { |
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159 enum ssl_encryption_level_t level; |
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160 |
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161 ngx_chain_t *crypto; |
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162 uint64_t crypto_received; |
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163 uint64_t crypto_sent; |
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164 |
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165 uint64_t pnum; /* to be sent */ |
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166 uint64_t largest_ack; /* received from peer */ |
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167 uint64_t largest_pn; /* received from peer */ |
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168 |
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169 ngx_queue_t frames; /* generated frames */ |
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170 ngx_queue_t sending; /* frames assigned to pkt */ |
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171 ngx_queue_t sent; /* frames waiting ACK */ |
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172 |
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173 uint64_t pending_ack; /* non sent ack-eliciting */ |
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174 uint64_t largest_range; |
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175 uint64_t first_range; |
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176 ngx_msec_t largest_received; |
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177 ngx_msec_t ack_delay_start; |
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178 ngx_uint_t nranges; |
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179 ngx_quic_ack_range_t ranges[NGX_QUIC_MAX_RANGES]; |
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180 ngx_uint_t send_ack; |
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181 }; |
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182 |
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183 |
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184 struct ngx_quic_connection_s { |
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185 uint32_t version; |
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186 |
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187 ngx_quic_socket_t *socket; |
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188 ngx_quic_socket_t *backup; |
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189 |
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190 ngx_queue_t sockets; |
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191 ngx_queue_t paths; |
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192 ngx_queue_t client_ids; |
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193 ngx_queue_t free_sockets; |
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194 ngx_queue_t free_paths; |
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195 ngx_queue_t free_client_ids; |
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196 |
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197 ngx_uint_t nsockets; |
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198 ngx_uint_t nclient_ids; |
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199 uint64_t max_retired_seqnum; |
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200 uint64_t client_seqnum; |
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201 uint64_t server_seqnum; |
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202 uint64_t path_seqnum; |
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203 |
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204 ngx_quic_tp_t tp; |
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205 ngx_quic_tp_t ctp; |
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206 |
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207 ngx_quic_send_ctx_t send_ctx[NGX_QUIC_SEND_CTX_LAST]; |
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208 |
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209 ngx_quic_keys_t *keys; |
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210 |
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211 ngx_quic_conf_t *conf; |
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212 |
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213 ngx_event_t push; |
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214 ngx_event_t pto; |
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215 ngx_event_t close; |
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216 ngx_event_t path_validation; |
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217 ngx_msec_t last_cc; |
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218 |
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219 ngx_msec_t first_rtt; |
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220 ngx_msec_t latest_rtt; |
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221 ngx_msec_t avg_rtt; |
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222 ngx_msec_t min_rtt; |
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223 ngx_msec_t rttvar; |
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224 |
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225 ngx_uint_t pto_count; |
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226 |
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227 ngx_queue_t free_frames; |
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228 ngx_chain_t *free_bufs; |
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229 ngx_buf_t *free_shadow_bufs; |
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230 |
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231 ngx_uint_t nframes; |
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232 #ifdef NGX_QUIC_DEBUG_ALLOC |
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233 ngx_uint_t nbufs; |
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234 #endif |
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235 |
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236 ngx_quic_streams_t streams; |
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237 ngx_quic_congestion_t congestion; |
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238 |
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239 off_t received; |
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240 |
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241 ngx_uint_t error; |
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242 enum ssl_encryption_level_t error_level; |
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243 ngx_uint_t error_ftype; |
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244 const char *error_reason; |
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245 |
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246 ngx_uint_t shutdown_code; |
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247 const char *shutdown_reason; |
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248 |
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249 unsigned error_app:1; |
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250 unsigned send_timer_set:1; |
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251 unsigned closing:1; |
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252 unsigned shutdown:1; |
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253 unsigned draining:1; |
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254 unsigned key_phase:1; |
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255 unsigned validated:1; |
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256 unsigned client_tp_done:1; |
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257 }; |
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258 |
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259 |
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260 ngx_int_t ngx_quic_apply_transport_params(ngx_connection_t *c, |
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261 ngx_quic_tp_t *ctp); |
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262 void ngx_quic_discard_ctx(ngx_connection_t *c, |
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263 enum ssl_encryption_level_t level); |
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264 void ngx_quic_close_connection(ngx_connection_t *c, ngx_int_t rc); |
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265 void ngx_quic_shutdown_quic(ngx_connection_t *c); |
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266 |
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267 #if (NGX_DEBUG) |
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268 void ngx_quic_connstate_dbg(ngx_connection_t *c); |
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269 #else |
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270 #define ngx_quic_connstate_dbg(c) |
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271 #endif |
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272 |
8747 | 273 #endif /* _NGX_EVENT_QUIC_CONNECTION_H_INCLUDED_ */ |