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annotate src/event/quic/ngx_event_quic_connection.h @ 9195:ff452f283aa9

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QUIC: reset RTT estimator for the new path. RTT is a property of the path, it must be reset on confirming a peer's ownership of its new address.
author Sergey Kandaurov <pluknet@nginx.com>
date Tue, 12 Dec 2023 20:20:51 +0400
parents a6f79f044de5
children 6c8595b77e66
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
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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 #if (NGX_QUIC_OPENSSL_COMPAT)
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29 #include <ngx_event_quic_openssl_compat.h>
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30 #endif
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31 #include <ngx_event_quic_transport.h>
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32 #include <ngx_event_quic_protection.h>
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33 #include <ngx_event_quic_frames.h>
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34 #include <ngx_event_quic_migration.h>
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35 #include <ngx_event_quic_connid.h>
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36 #include <ngx_event_quic_streams.h>
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37 #include <ngx_event_quic_ssl.h>
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38 #include <ngx_event_quic_tokens.h>
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39 #include <ngx_event_quic_ack.h>
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40 #include <ngx_event_quic_output.h>
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41 #include <ngx_event_quic_socket.h>
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42
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43
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44 /* RFC 9002, 6.2.2. Handshakes and New Paths: kInitialRtt */
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45 #define NGX_QUIC_INITIAL_RTT 333 /* ms */
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46
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47 #define NGX_QUIC_UNSET_PN (uint64_t) -1
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48
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49 #define NGX_QUIC_SEND_CTX_LAST (NGX_QUIC_ENCRYPTION_LAST - 1)
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50
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51 /* 0-RTT and 1-RTT data exist in the same packet number space,
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52 * so we have 3 packet number spaces:
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53 *
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54 * 0 - Initial
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55 * 1 - Handshake
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56 * 2 - 0-RTT and 1-RTT
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57 */
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58 #define ngx_quic_get_send_ctx(qc, level) \
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59 ((level) == ssl_encryption_initial) ? &((qc)->send_ctx[0]) \
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60 : (((level) == ssl_encryption_handshake) ? &((qc)->send_ctx[1]) \
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61 : &((qc)->send_ctx[2]))
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62
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63 #define ngx_quic_get_connection(c) \
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64 (((c)->udp) ? (((ngx_quic_socket_t *)((c)->udp))->quic) : NULL)
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65
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66 #define ngx_quic_get_socket(c) ((ngx_quic_socket_t *)((c)->udp))
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67
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68 #define ngx_quic_init_rtt(qc) \
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69 (qc)->avg_rtt = NGX_QUIC_INITIAL_RTT; \
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70 (qc)->rttvar = NGX_QUIC_INITIAL_RTT / 2; \
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71 (qc)->min_rtt = NGX_TIMER_INFINITE; \
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72 (qc)->first_rtt = NGX_TIMER_INFINITE; \
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73 (qc)->latest_rtt = 0;
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74
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75
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76 typedef enum {
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77 NGX_QUIC_PATH_IDLE = 0,
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78 NGX_QUIC_PATH_VALIDATING,
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79 NGX_QUIC_PATH_WAITING,
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80 NGX_QUIC_PATH_MTUD
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81 } ngx_quic_path_state_e;
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82
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83
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84 struct ngx_quic_client_id_s {
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85 ngx_queue_t queue;
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86 uint64_t seqnum;
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87 size_t len;
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88 u_char id[NGX_QUIC_CID_LEN_MAX];
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89 u_char sr_token[NGX_QUIC_SR_TOKEN_LEN];
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90 ngx_uint_t used; /* unsigned used:1; */
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91 };
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92
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93
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94 struct ngx_quic_server_id_s {
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95 uint64_t seqnum;
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96 size_t len;
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97 u_char id[NGX_QUIC_CID_LEN_MAX];
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98 };
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99
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100
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101 struct ngx_quic_path_s {
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102 ngx_queue_t queue;
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103 struct sockaddr *sockaddr;
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104 ngx_sockaddr_t sa;
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105 socklen_t socklen;
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106 ngx_quic_client_id_t *cid;
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107 ngx_quic_path_state_e state;
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108 ngx_msec_t expires;
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109 ngx_uint_t tries;
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110 ngx_uint_t tag;
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111 size_t mtu;
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112 size_t mtud;
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113 size_t max_mtu;
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114 off_t sent;
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115 off_t received;
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116 u_char challenge[2][8];
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117 uint64_t seqnum;
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118 uint64_t mtu_pnum[NGX_QUIC_PATH_RETRIES];
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119 ngx_str_t addr_text;
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120 u_char text[NGX_SOCKADDR_STRLEN];
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121 unsigned validated:1;
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122 unsigned mtu_unvalidated:1;
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123 };
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124
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125
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126 struct ngx_quic_socket_s {
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127 ngx_udp_connection_t udp;
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128 ngx_quic_connection_t *quic;
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129 ngx_queue_t queue;
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130 ngx_quic_server_id_t sid;
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diff changeset
131 ngx_sockaddr_t sockaddr;
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diff changeset
132 socklen_t socklen;
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diff changeset
133 ngx_uint_t used; /* unsigned used:1; */
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diff changeset
134 };
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135
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136
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137 typedef struct {
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138 ngx_rbtree_t tree;
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diff changeset
139 ngx_rbtree_node_t sentinel;
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diff changeset
140
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diff changeset
141 ngx_queue_t uninitialized;
9010
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diff changeset
142 ngx_queue_t free;
8736
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143
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diff changeset
144 uint64_t sent;
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Roman Arutyunyan <arut@nginx.com>
parents: 8782
diff changeset
145 uint64_t recv_offset;
af33d1ef1c3c QUIC: stream flow control refactored.
Roman Arutyunyan <arut@nginx.com>
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diff changeset
146 uint64_t recv_window;
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diff changeset
147 uint64_t recv_last;
8736
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diff changeset
148 uint64_t recv_max_data;
9010
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diff changeset
149 uint64_t send_offset;
8736
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diff changeset
150 uint64_t send_max_data;
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151
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parents:
diff changeset
152 uint64_t server_max_streams_uni;
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parents:
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153 uint64_t server_max_streams_bidi;
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diff changeset
154 uint64_t server_streams_uni;
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Vladimir Homutov <vl@nginx.com>
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diff changeset
155 uint64_t server_streams_bidi;
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156
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diff changeset
157 uint64_t client_max_streams_uni;
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parents:
diff changeset
158 uint64_t client_max_streams_bidi;
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parents:
diff changeset
159 uint64_t client_streams_uni;
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Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
160 uint64_t client_streams_bidi;
8827
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diff changeset
161
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diff changeset
162 ngx_uint_t initialized;
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diff changeset
163 /* unsigned initialized:1; */
8736
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parents:
diff changeset
164 } ngx_quic_streams_t;
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165
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166
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parents:
diff changeset
167 typedef struct {
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parents:
diff changeset
168 size_t in_flight;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
169 size_t window;
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Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
170 size_t ssthresh;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
171 ngx_msec_t recovery_start;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
172 } ngx_quic_congestion_t;
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173
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174
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parents:
diff changeset
175 /*
8797
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parents: 8792
diff changeset
176 * RFC 9000, 12.3. Packet Numbers
8736
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diff changeset
177 *
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parents:
diff changeset
178 * Conceptually, a packet number space is the context in which a packet
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parents:
diff changeset
179 * can be processed and acknowledged. Initial packets can only be sent
8797
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diff changeset
180 * with Initial packet protection keys and acknowledged in packets that
8736
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parents:
diff changeset
181 * are also Initial packets.
8797
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parents: 8792
diff changeset
182 */
8751
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parents: 8750
diff changeset
183 struct ngx_quic_send_ctx_s {
8736
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Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
184 enum ssl_encryption_level_t level;
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diff changeset
185
9011
f9c788f3f5cc QUIC: ngx_quic_buffer_t object.
Roman Arutyunyan <arut@nginx.com>
parents: 9010
diff changeset
186 ngx_quic_buffer_t crypto;
8782
b3f6ad181df4 QUIC: refactored CRYPTO and STREAM buffer ordering.
Roman Arutyunyan <arut@nginx.com>
parents: 8764
diff changeset
187 uint64_t crypto_sent;
b3f6ad181df4 QUIC: refactored CRYPTO and STREAM buffer ordering.
Roman Arutyunyan <arut@nginx.com>
parents: 8764
diff changeset
188
8736
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parents:
diff changeset
189 uint64_t pnum; /* to be sent */
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
190 uint64_t largest_ack; /* received from peer */
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
191 uint64_t largest_pn; /* received from peer */
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
192
8822
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Vladimir Homutov <vl@nginx.com>
parents: 8797
diff changeset
193 ngx_queue_t frames; /* generated frames */
ad046179eb91 QUIC: handle EAGAIN properly on UDP sockets.
Vladimir Homutov <vl@nginx.com>
parents: 8797
diff changeset
194 ngx_queue_t sending; /* frames assigned to pkt */
ad046179eb91 QUIC: handle EAGAIN properly on UDP sockets.
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parents: 8797
diff changeset
195 ngx_queue_t sent; /* frames waiting ACK */
8736
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diff changeset
196
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diff changeset
197 uint64_t pending_ack; /* non sent ack-eliciting */
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parents:
diff changeset
198 uint64_t largest_range;
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Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
199 uint64_t first_range;
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Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
200 ngx_msec_t largest_received;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
201 ngx_msec_t ack_delay_start;
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parents:
diff changeset
202 ngx_uint_t nranges;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
203 ngx_quic_ack_range_t ranges[NGX_QUIC_MAX_RANGES];
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
204 ngx_uint_t send_ack;
8751
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parents: 8750
diff changeset
205 };
8736
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diff changeset
206
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diff changeset
207
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parents:
diff changeset
208 struct ngx_quic_connection_s {
714e9af983de QUIC: separate header for ngx_quic_connection_t.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
209 uint32_t version;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
210
8971
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Vladimir Homutov <vl@nginx.com>
parents: 8950
diff changeset
211 ngx_quic_path_t *path;
8736
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parents:
diff changeset
212
8763
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diff changeset
213 ngx_queue_t sockets;
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diff changeset
214 ngx_queue_t paths;
8736
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parents:
diff changeset
215 ngx_queue_t client_ids;
8763
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parents: 8755
diff changeset
216 ngx_queue_t free_sockets;
4117aa7fa38e QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
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diff changeset
217 ngx_queue_t free_paths;
8736
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parents:
diff changeset
218 ngx_queue_t free_client_ids;
8763
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diff changeset
219
4117aa7fa38e QUIC: connection migration.
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diff changeset
220 ngx_uint_t nsockets;
8736
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parents:
diff changeset
221 ngx_uint_t nclient_ids;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
222 uint64_t max_retired_seqnum;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
223 uint64_t client_seqnum;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
224 uint64_t server_seqnum;
8763
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parents: 8755
diff changeset
225 uint64_t path_seqnum;
8736
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parents:
diff changeset
226
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parents:
diff changeset
227 ngx_quic_tp_t tp;
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parents:
diff changeset
228 ngx_quic_tp_t ctp;
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parents:
diff changeset
229
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parents:
diff changeset
230 ngx_quic_send_ctx_t send_ctx[NGX_QUIC_SEND_CTX_LAST];
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diff changeset
231
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Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
232 ngx_quic_keys_t *keys;
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diff changeset
233
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Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
234 ngx_quic_conf_t *conf;
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235
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parents:
diff changeset
236 ngx_event_t push;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
237 ngx_event_t pto;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
238 ngx_event_t close;
8763
4117aa7fa38e QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents: 8755
diff changeset
239 ngx_event_t path_validation;
9152
2880f60a80c3 QUIC: posted generating TLS Key Update next keys.
Sergey Kandaurov <pluknet@nginx.com>
parents: 9147
diff changeset
240 ngx_event_t key_update;
2880f60a80c3 QUIC: posted generating TLS Key Update next keys.
Sergey Kandaurov <pluknet@nginx.com>
parents: 9147
diff changeset
241
8736
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diff changeset
242 ngx_msec_t last_cc;
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Vladimir Homutov <vl@nginx.com>
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diff changeset
243
8792
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Vladimir Homutov <vl@nginx.com>
parents: 8791
diff changeset
244 ngx_msec_t first_rtt;
8736
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parents:
diff changeset
245 ngx_msec_t latest_rtt;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
246 ngx_msec_t avg_rtt;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
247 ngx_msec_t min_rtt;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
248 ngx_msec_t rttvar;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
249
714e9af983de QUIC: separate header for ngx_quic_connection_t.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
250 ngx_uint_t pto_count;
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
251
714e9af983de QUIC: separate header for ngx_quic_connection_t.
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parents:
diff changeset
252 ngx_queue_t free_frames;
8950
fb811b6c76ee QUIC: refactored buffer allocation, spliting and freeing.
Roman Arutyunyan <arut@nginx.com>
parents: 8940
diff changeset
253 ngx_buf_t *free_bufs;
8736
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parents:
diff changeset
254 ngx_buf_t *free_shadow_bufs;
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parents:
diff changeset
255
8883
404de224517e QUIC: limited the total number of frames.
Roman Arutyunyan <arut@nginx.com>
parents: 8882
diff changeset
256 ngx_uint_t nframes;
8736
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parents:
diff changeset
257 #ifdef NGX_QUIC_DEBUG_ALLOC
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parents:
diff changeset
258 ngx_uint_t nbufs;
8950
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Roman Arutyunyan <arut@nginx.com>
parents: 8940
diff changeset
259 ngx_uint_t nshadowbufs;
8736
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parents:
diff changeset
260 #endif
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Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
261
9080
7da4791e0264 QUIC: OpenSSL compatibility layer.
Roman Arutyunyan <arut@nginx.com>
parents: 9017
diff changeset
262 #if (NGX_QUIC_OPENSSL_COMPAT)
7da4791e0264 QUIC: OpenSSL compatibility layer.
Roman Arutyunyan <arut@nginx.com>
parents: 9017
diff changeset
263 ngx_quic_compat_t *compat;
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264 #endif
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265
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266 ngx_quic_streams_t streams;
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267 ngx_quic_congestion_t congestion;
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268
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269 off_t received;
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270
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271 ngx_uint_t error;
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272 enum ssl_encryption_level_t error_level;
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273 ngx_uint_t error_ftype;
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274 const char *error_reason;
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275
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276 ngx_uint_t shutdown_code;
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277 const char *shutdown_reason;
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278
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279 unsigned error_app:1;
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280 unsigned send_timer_set:1;
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281 unsigned closing:1;
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282 unsigned shutdown:1;
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283 unsigned draining:1;
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284 unsigned key_phase:1;
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285 unsigned validated:1;
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286 unsigned client_tp_done:1;
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287 };
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288
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289
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290 ngx_int_t ngx_quic_apply_transport_params(ngx_connection_t *c,
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291 ngx_quic_tp_t *ctp);
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292 void ngx_quic_discard_ctx(ngx_connection_t *c,
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293 enum ssl_encryption_level_t level);
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294 void ngx_quic_close_connection(ngx_connection_t *c, ngx_int_t rc);
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295 void ngx_quic_shutdown_quic(ngx_connection_t *c);
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296
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297 #if (NGX_DEBUG)
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298 void ngx_quic_connstate_dbg(ngx_connection_t *c);
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299 #else
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300 #define ngx_quic_connstate_dbg(c)
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301 #endif
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302
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303 #endif /* _NGX_EVENT_QUIC_CONNECTION_H_INCLUDED_ */