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annotate src/event/quic/ngx_event_quic_connection.h @ 8763:4117aa7fa38e quic

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QUIC: connection migration. The patch adds proper transitions between multiple networking addresses that can be used by a single quic connection. New networking paths are validated using PATH_CHALLENGE/PATH_RESPONSE frames.
author Vladimir Homutov <vl@nginx.com>
date Thu, 29 Apr 2021 15:35:02 +0300
parents b4e6b7049984
children 0bd1dd39a08b
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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 typedef struct ngx_quic_connection_s ngx_quic_connection_t;
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15 typedef struct ngx_quic_server_id_s ngx_quic_server_id_t;
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16 typedef struct ngx_quic_client_id_s ngx_quic_client_id_t;
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17 typedef struct ngx_quic_send_ctx_s ngx_quic_send_ctx_t;
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18 typedef struct ngx_quic_socket_s ngx_quic_socket_t;
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19 typedef struct ngx_quic_path_s ngx_quic_path_t;
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20 typedef struct ngx_quic_keys_s ngx_quic_keys_t;
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21
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22 #include <ngx_event_quic_transport.h>
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23 #include <ngx_event_quic_protection.h>
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24 #include <ngx_event_quic_frames.h>
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25 #include <ngx_event_quic_migration.h>
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26 #include <ngx_event_quic_connid.h>
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27 #include <ngx_event_quic_streams.h>
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28 #include <ngx_event_quic_ssl.h>
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29 #include <ngx_event_quic_tokens.h>
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30 #include <ngx_event_quic_ack.h>
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31 #include <ngx_event_quic_output.h>
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32 #include <ngx_event_quic_socket.h>
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33
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34
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35 /* quic-recovery, section 6.2.2, kInitialRtt */
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36 #define NGX_QUIC_INITIAL_RTT 333 /* ms */
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37
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38 #define NGX_QUIC_UNSET_PN (uint64_t) -1
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39
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40 #define NGX_QUIC_SEND_CTX_LAST (NGX_QUIC_ENCRYPTION_LAST - 1)
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41
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42 /* 0-RTT and 1-RTT data exist in the same packet number space,
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43 * so we have 3 packet number spaces:
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44 *
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45 * 0 - Initial
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46 * 1 - Handshake
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47 * 2 - 0-RTT and 1-RTT
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48 */
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49 #define ngx_quic_get_send_ctx(qc, level) \
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50 ((level) == ssl_encryption_initial) ? &((qc)->send_ctx[0]) \
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51 : (((level) == ssl_encryption_handshake) ? &((qc)->send_ctx[1]) \
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52 : &((qc)->send_ctx[2]))
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53
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54 #define ngx_quic_get_connection(c) \
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55 (((c)->udp) ? (((ngx_quic_socket_t *)((c)->udp))->quic) : NULL)
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56
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57 #define ngx_quic_get_socket(c) ((ngx_quic_socket_t *)((c)->udp))
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59
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60 struct ngx_quic_client_id_s {
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61 ngx_queue_t queue;
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62 uint64_t seqnum;
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63 size_t len;
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64 u_char id[NGX_QUIC_CID_LEN_MAX];
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65 u_char sr_token[NGX_QUIC_SR_TOKEN_LEN];
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66 ngx_uint_t refcnt;
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67 };
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68
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69
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70 struct ngx_quic_server_id_s {
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71 uint64_t seqnum;
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72 size_t len;
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73 u_char id[NGX_QUIC_CID_LEN_MAX];
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74 };
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75
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76
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77 struct ngx_quic_path_s {
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78 ngx_queue_t queue;
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79 struct sockaddr *sockaddr;
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80 socklen_t socklen;
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81 ngx_uint_t state;
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82 ngx_msec_t expires;
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83 ngx_uint_t tries;
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84 off_t sent;
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85 off_t received;
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86 u_char challenge1[8];
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87 u_char challenge2[8];
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88 ngx_uint_t refcnt;
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89 uint64_t seqnum;
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90 time_t validated_at;
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91 ngx_str_t addr_text;
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92 u_char text[NGX_SOCKADDR_STRLEN];
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93 };
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94
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95
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96 struct ngx_quic_socket_s {
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97 ngx_udp_connection_t udp;
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98 ngx_quic_connection_t *quic;
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99 ngx_queue_t queue;
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100
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101 ngx_quic_server_id_t sid;
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102
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103 ngx_quic_path_t *path;
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104 ngx_quic_client_id_t *cid;
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105 };
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106
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107
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108 typedef struct {
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109 ngx_rbtree_t tree;
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110 ngx_rbtree_node_t sentinel;
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111
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112 uint64_t received;
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113 uint64_t sent;
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114 uint64_t recv_max_data;
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115 uint64_t send_max_data;
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116
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117 uint64_t server_max_streams_uni;
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118 uint64_t server_max_streams_bidi;
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119 uint64_t server_streams_uni;
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120 uint64_t server_streams_bidi;
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121
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122 uint64_t client_max_streams_uni;
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123 uint64_t client_max_streams_bidi;
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124 uint64_t client_streams_uni;
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125 uint64_t client_streams_bidi;
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126 } ngx_quic_streams_t;
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127
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128
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129 typedef struct {
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130 size_t in_flight;
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131 size_t window;
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132 size_t ssthresh;
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133 ngx_msec_t recovery_start;
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134 } ngx_quic_congestion_t;
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135
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136
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137 struct ngx_quic_frames_stream_s {
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138 uint64_t sent;
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139 uint64_t received;
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140 ngx_queue_t frames; /* reorder queue */
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141 size_t total; /* size of buffered data */
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142 };
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143
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144
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145 /*
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146 * 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 which
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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 uint64_t pnum; /* to be sent */
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157 uint64_t largest_ack; /* received from peer */
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158 uint64_t largest_pn; /* received from peer */
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159
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160 ngx_queue_t frames;
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161 ngx_queue_t sent;
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162
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163 uint64_t pending_ack; /* non sent ack-eliciting */
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164 uint64_t largest_range;
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165 uint64_t first_range;
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166 ngx_msec_t largest_received;
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167 ngx_msec_t ack_delay_start;
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168 ngx_uint_t nranges;
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169 ngx_quic_ack_range_t ranges[NGX_QUIC_MAX_RANGES];
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170 ngx_uint_t send_ack;
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171 };
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172
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173
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174 struct ngx_quic_connection_s {
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175 uint32_t version;
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176
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177 ngx_quic_socket_t *socket;
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178 ngx_quic_socket_t *backup;
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179
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180 ngx_queue_t sockets;
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181 ngx_queue_t paths;
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182 ngx_queue_t client_ids;
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183 ngx_queue_t free_sockets;
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184 ngx_queue_t free_paths;
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185 ngx_queue_t free_client_ids;
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186
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187 ngx_uint_t nsockets;
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188 ngx_uint_t nclient_ids;
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189 uint64_t max_retired_seqnum;
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190 uint64_t client_seqnum;
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191 uint64_t server_seqnum;
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192 uint64_t path_seqnum;
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193
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194 ngx_uint_t client_tp_done;
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195 ngx_quic_tp_t tp;
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196 ngx_quic_tp_t ctp;
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197
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198 ngx_quic_send_ctx_t send_ctx[NGX_QUIC_SEND_CTX_LAST];
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199
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200 ngx_quic_frames_stream_t crypto[NGX_QUIC_ENCRYPTION_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
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257 /********************************* DEBUG *************************************/
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258
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259 #if (NGX_DEBUG)
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260 void ngx_quic_connstate_dbg(ngx_connection_t *c);
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261 #else
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262 #define ngx_quic_connstate_dbg(c)
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263 #endif
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264
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265
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266 /* #define NGX_QUIC_DEBUG_PACKETS */ /* dump packet contents */
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267 /* #define NGX_QUIC_DEBUG_FRAMES */ /* dump frames contents */
c8bda5e1e662 QUIC: headers cleanup.
Vladimir Homutov <vl@nginx.com>
parents: 8737
diff changeset
268 /* #define NGX_QUIC_DEBUG_ALLOC */ /* log frames and bufs alloc */
c8bda5e1e662 QUIC: headers cleanup.
Vladimir Homutov <vl@nginx.com>
parents: 8737
diff changeset
269 /* #define NGX_QUIC_DEBUG_CRYPTO */
c8bda5e1e662 QUIC: headers cleanup.
Vladimir Homutov <vl@nginx.com>
parents: 8737
diff changeset
270
c8bda5e1e662 QUIC: headers cleanup.
Vladimir Homutov <vl@nginx.com>
parents: 8737
diff changeset
271 #endif /* _NGX_EVENT_QUIC_CONNECTION_H_INCLUDED_ */