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annotate src/event/quic/ngx_event_quic_connection.h @ 8749:660c4a2f95f3 quic

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QUIC: separate files for frames related processing.
author Vladimir Homutov <vl@nginx.com>
date Tue, 13 Apr 2021 14:38:46 +0300
parents e0cb1e58ca13
children 41807e581de9
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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
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14 #include <ngx_event_quic_transport.h>
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15 #include <ngx_event_quic_protection.h>
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16
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17 typedef struct ngx_quic_connection_s ngx_quic_connection_t;
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18
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19 #include <ngx_event_quic_frames.h>
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20 #include <ngx_event_quic_migration.h>
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21 #include <ngx_event_quic_connid.h>
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22
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23
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24 #define NGX_QUIC_MAX_SHORT_HEADER 25 /* 1 flags + 20 dcid + 4 pn */
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25 #define NGX_QUIC_MAX_LONG_HEADER 56
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26 /* 1 flags + 4 version + 2 x (1 + 20) s/dcid + 4 pn + 4 len + token len */
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27
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28 #define NGX_QUIC_MAX_UDP_PAYLOAD_OUT 1252
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29 #define NGX_QUIC_MAX_UDP_PAYLOAD_OUT6 1232
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30
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31 #define NGX_QUIC_RETRY_TOKEN_LIFETIME 3 /* seconds */
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32 #define NGX_QUIC_NEW_TOKEN_LIFETIME 600 /* seconds */
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33 #define NGX_QUIC_RETRY_BUFFER_SIZE 256
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34 /* 1 flags + 4 version + 3 x (1 + 20) s/o/dcid + itag + token(64) */
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35 #define NGX_QUIC_MAX_TOKEN_SIZE 64
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36 /* SHA-1(addr)=20 + sizeof(time_t) + retry(1) + odcid.len(1) + odcid */
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37
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38 /* quic-recovery, section 6.2.2, kInitialRtt */
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39 #define NGX_QUIC_INITIAL_RTT 333 /* ms */
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40
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41 /* quic-recovery, section 6.1.1, Packet Threshold */
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42 #define NGX_QUIC_PKT_THR 3 /* packets */
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43 /* quic-recovery, section 6.1.2, Time Threshold */
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44 #define NGX_QUIC_TIME_THR 1.125
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45 #define NGX_QUIC_TIME_GRANULARITY 1 /* ms */
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46
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47 #define NGX_QUIC_CC_MIN_INTERVAL 1000 /* 1s */
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48
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49
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50 #define NGX_QUIC_UNSET_PN (uint64_t) -1
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51
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52 #define NGX_QUIC_SEND_CTX_LAST (NGX_QUIC_ENCRYPTION_LAST - 1)
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53
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54 /* 0-RTT and 1-RTT data exist in the same packet number space,
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55 * so we have 3 packet number spaces:
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56 *
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57 * 0 - Initial
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58 * 1 - Handshake
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59 * 2 - 0-RTT and 1-RTT
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60 */
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61 #define ngx_quic_get_send_ctx(qc, level) \
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62 ((level) == ssl_encryption_initial) ? &((qc)->send_ctx[0]) \
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63 : (((level) == ssl_encryption_handshake) ? &((qc)->send_ctx[1]) \
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64 : &((qc)->send_ctx[2]))
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65
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66 #define ngx_quic_get_connection(c) \
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67 (((c)->udp) ? (((ngx_quic_server_id_t *)((c)->udp))->quic) : NULL)
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68
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69
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70 typedef struct {
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71 ngx_queue_t queue;
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72 uint64_t seqnum;
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73 size_t len;
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74 u_char id[NGX_QUIC_CID_LEN_MAX];
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75 u_char sr_token[NGX_QUIC_SR_TOKEN_LEN];
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76 } ngx_quic_client_id_t;
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77
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78
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79 typedef struct {
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80 ngx_udp_connection_t udp;
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81 ngx_quic_connection_t *quic;
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82 ngx_queue_t queue;
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83 uint64_t seqnum;
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84 size_t len;
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85 u_char id[NGX_QUIC_CID_LEN_MAX];
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86 } ngx_quic_server_id_t;
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87
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88
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89 typedef struct {
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90 ngx_rbtree_t tree;
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91 ngx_rbtree_node_t sentinel;
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92
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93 uint64_t received;
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94 uint64_t sent;
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95 uint64_t recv_max_data;
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96 uint64_t send_max_data;
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97
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98 uint64_t server_max_streams_uni;
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99 uint64_t server_max_streams_bidi;
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100 uint64_t server_streams_uni;
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101 uint64_t server_streams_bidi;
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102
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103 uint64_t client_max_streams_uni;
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104 uint64_t client_max_streams_bidi;
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105 uint64_t client_streams_uni;
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106 uint64_t client_streams_bidi;
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107 } ngx_quic_streams_t;
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108
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109
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110 typedef struct {
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111 size_t in_flight;
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112 size_t window;
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113 size_t ssthresh;
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114 ngx_msec_t recovery_start;
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115 } ngx_quic_congestion_t;
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116
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117
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118 /*
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119 * 12.3. Packet Numbers
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120 *
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121 * Conceptually, a packet number space is the context in which a packet
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122 * can be processed and acknowledged. Initial packets can only be sent
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123 * with Initial packet protection keys and acknowledged in packets which
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124 * are also Initial packets.
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125 */
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126 typedef struct {
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127 enum ssl_encryption_level_t level;
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128
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129 uint64_t pnum; /* to be sent */
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130 uint64_t largest_ack; /* received from peer */
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131 uint64_t largest_pn; /* received from peer */
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132
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133 ngx_queue_t frames;
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134 ngx_queue_t sent;
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135
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136 uint64_t pending_ack; /* non sent ack-eliciting */
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137 uint64_t largest_range;
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138 uint64_t first_range;
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139 ngx_msec_t largest_received;
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140 ngx_msec_t ack_delay_start;
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141 ngx_uint_t nranges;
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142 ngx_quic_ack_range_t ranges[NGX_QUIC_MAX_RANGES];
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143 ngx_uint_t send_ack;
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144 } ngx_quic_send_ctx_t;
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145
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146
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147 struct ngx_quic_connection_s {
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148 uint32_t version;
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149
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150 ngx_str_t scid; /* initial client ID */
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151 ngx_str_t dcid; /* server (our own) ID */
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152 ngx_str_t odcid; /* original server ID */
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153
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154 struct sockaddr *sockaddr;
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155 socklen_t socklen;
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156
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157 ngx_queue_t client_ids;
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158 ngx_queue_t server_ids;
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159 ngx_queue_t free_client_ids;
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160 ngx_queue_t free_server_ids;
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161 ngx_uint_t nclient_ids;
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162 ngx_uint_t nserver_ids;
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163 uint64_t max_retired_seqnum;
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164 uint64_t client_seqnum;
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165 uint64_t server_seqnum;
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166
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167 ngx_uint_t client_tp_done;
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168 ngx_quic_tp_t tp;
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169 ngx_quic_tp_t ctp;
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170
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171 ngx_quic_send_ctx_t send_ctx[NGX_QUIC_SEND_CTX_LAST];
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172
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173 ngx_quic_frames_stream_t crypto[NGX_QUIC_ENCRYPTION_LAST];
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174
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175 ngx_quic_keys_t *keys;
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176
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177 ngx_quic_conf_t *conf;
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178
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179 ngx_event_t push;
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180 ngx_event_t pto;
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181 ngx_event_t close;
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182 ngx_msec_t last_cc;
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183
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184 ngx_msec_t latest_rtt;
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185 ngx_msec_t avg_rtt;
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186 ngx_msec_t min_rtt;
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187 ngx_msec_t rttvar;
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188
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189 ngx_uint_t pto_count;
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190
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191 ngx_queue_t free_frames;
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192 ngx_chain_t *free_bufs;
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193 ngx_buf_t *free_shadow_bufs;
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194
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195 #ifdef NGX_QUIC_DEBUG_ALLOC
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196 ngx_uint_t nframes;
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197 ngx_uint_t nbufs;
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198 #endif
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199
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200 ngx_quic_streams_t streams;
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201 ngx_quic_congestion_t congestion;
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202 off_t received;
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203
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204 ngx_uint_t error;
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205 enum ssl_encryption_level_t error_level;
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206 ngx_uint_t error_ftype;
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207 const char *error_reason;
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208
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209 ngx_uint_t shutdown_code;
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210 const char *shutdown_reason;
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211
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212 unsigned error_app:1;
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213 unsigned send_timer_set:1;
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214 unsigned closing:1;
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215 unsigned shutdown:1;
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216 unsigned draining:1;
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217 unsigned key_phase:1;
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218 unsigned validated:1;
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219 };
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220
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221
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222 void ngx_quic_close_connection(ngx_connection_t *c, ngx_int_t rc);
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223 ngx_msec_t ngx_quic_pto(ngx_connection_t *c, ngx_quic_send_ctx_t *ctx);
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224
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225 ngx_int_t ngx_quic_new_sr_token(ngx_connection_t *c, ngx_str_t *cid,
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226 u_char *secret, u_char *token);
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227
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228 /********************************* DEBUG *************************************/
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229
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230 /* #define NGX_QUIC_DEBUG_PACKETS */ /* dump packet contents */
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231 /* #define NGX_QUIC_DEBUG_FRAMES */ /* dump frames contents */
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232 /* #define NGX_QUIC_DEBUG_ALLOC */ /* log frames and bufs alloc */
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233 /* #define NGX_QUIC_DEBUG_CRYPTO */
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234
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235 #endif /* _NGX_EVENT_QUIC_CONNECTION_H_INCLUDED_ */