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annotate src/event/ngx_event_quic_transport.h @ 8358:2a6e91a1691d quic

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TODOs cleanup in transport. We always generate stream frames that have length. The 'len' member is used during parsing incoming frames and can be safely ignored when generating output.
author Vladimir Homutov <vl@nginx.com>
date Thu, 23 Apr 2020 12:25:00 +0300
parents a5141e6b3214
children 262396242352
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1
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2 /*
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3 * Copyright (C) Nginx, Inc.
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4 */
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7 #ifndef _NGX_EVENT_QUIC_WIRE_H_INCLUDED_
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8 #define _NGX_EVENT_QUIC_WIRE_H_INCLUDED_
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10
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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15 #define ngx_quic_long_pkt(flags) ((flags) & 0x80) /* 17.2 */
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16 #define ngx_quic_short_pkt(flags) (((flags) & 0x80) == 0) /* 17.3 */
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17
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18 /* Long packet types */
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19 #define NGX_QUIC_PKT_INITIAL 0xC0 /* 17.2.2 */
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20 #define NGX_QUIC_PKT_ZRTT 0xD0 /* 17.2.3 */
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21 #define NGX_QUIC_PKT_HANDSHAKE 0xE0 /* 17.2.4 */
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22 #define NGX_QUIC_PKT_RETRY 0xF0 /* 17.2.5 */
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23 #define NGX_QUIC_PKT_KPHASE 0x04 /* 17.3 */
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24
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25 #define ngx_quic_pkt_in(flags) (((flags) & 0xF0) == NGX_QUIC_PKT_INITIAL)
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26 #define ngx_quic_pkt_zrtt(flags) (((flags) & 0xF0) == NGX_QUIC_PKT_ZRTT)
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27 #define ngx_quic_pkt_hs(flags) (((flags) & 0xF0) == NGX_QUIC_PKT_HANDSHAKE)
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28 #define ngx_quic_pkt_retry(flags) (((flags) & 0xF0) == NGX_QUIC_PKT_RETRY)
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29
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30 /* 12.4. Frames and Frame Types */
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31 #define NGX_QUIC_FT_PADDING 0x00
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32 #define NGX_QUIC_FT_PING 0x01
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33 #define NGX_QUIC_FT_ACK 0x02
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34 #define NGX_QUIC_FT_ACK_ECN 0x03
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35 #define NGX_QUIC_FT_RESET_STREAM 0x04
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36 #define NGX_QUIC_FT_STOP_SENDING 0x05
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37 #define NGX_QUIC_FT_CRYPTO 0x06
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38 #define NGX_QUIC_FT_NEW_TOKEN 0x07
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39 #define NGX_QUIC_FT_STREAM0 0x08
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40 #define NGX_QUIC_FT_STREAM1 0x09
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41 #define NGX_QUIC_FT_STREAM2 0x0A
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42 #define NGX_QUIC_FT_STREAM3 0x0B
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43 #define NGX_QUIC_FT_STREAM4 0x0C
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44 #define NGX_QUIC_FT_STREAM5 0x0D
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45 #define NGX_QUIC_FT_STREAM6 0x0E
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46 #define NGX_QUIC_FT_STREAM7 0x0F
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47 #define NGX_QUIC_FT_MAX_DATA 0x10
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48 #define NGX_QUIC_FT_MAX_STREAM_DATA 0x11
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49 #define NGX_QUIC_FT_MAX_STREAMS 0x12
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50 #define NGX_QUIC_FT_MAX_STREAMS2 0x13
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51 #define NGX_QUIC_FT_DATA_BLOCKED 0x14
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52 #define NGX_QUIC_FT_STREAM_DATA_BLOCKED 0x15
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53 #define NGX_QUIC_FT_STREAMS_BLOCKED 0x16
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54 #define NGX_QUIC_FT_STREAMS_BLOCKED2 0x17
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55 #define NGX_QUIC_FT_NEW_CONNECTION_ID 0x18
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56 #define NGX_QUIC_FT_RETIRE_CONNECTION_ID 0x19
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57 #define NGX_QUIC_FT_PATH_CHALLENGE 0x1A
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58 #define NGX_QUIC_FT_PATH_RESPONSE 0x1B
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59 #define NGX_QUIC_FT_CONNECTION_CLOSE 0x1C
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60 #define NGX_QUIC_FT_CONNECTION_CLOSE2 0x1D
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61 #define NGX_QUIC_FT_HANDSHAKE_DONE 0x1E
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62
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63 /* 22.4. QUIC Transport Error Codes Registry */
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64 #define NGX_QUIC_ERR_NO_ERROR 0x00
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65 #define NGX_QUIC_ERR_INTERNAL_ERROR 0x01
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66 #define NGX_QUIC_ERR_SERVER_BUSY 0x02
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67 #define NGX_QUIC_ERR_FLOW_CONTROL_ERROR 0x03
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68 #define NGX_QUIC_ERR_STREAM_LIMIT_ERROR 0x04
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69 #define NGX_QUIC_ERR_STREAM_STATE_ERROR 0x05
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70 #define NGX_QUIC_ERR_FINAL_SIZE_ERROR 0x06
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71 #define NGX_QUIC_ERR_FRAME_ENCODING_ERROR 0x07
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72 #define NGX_QUIC_ERR_TRANSPORT_PARAMETER_ERROR 0x08
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73 #define NGX_QUIC_ERR_CONNECTION_ID_LIMIT_ERROR 0x09
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74 #define NGX_QUIC_ERR_PROTOCOL_VIOLATION 0x0A
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75 #define NGX_QUIC_ERR_INVALID_TOKEN 0x0B
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76 /* 0xC is not defined */
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77 #define NGX_QUIC_ERR_CRYPTO_BUFFER_EXCEEDED 0x0D
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78 /* 0xE is not defined */
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79 /* 0xF is not defined */
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80 #define NGX_QUIC_ERR_CRYPTO_ERROR 0x10
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81
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82 #define NGX_QUIC_ERR_LAST NGX_QUIC_ERR_CRYPTO_ERROR
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83
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84 /* Transport parameters */
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85 #define NGX_QUIC_TP_ORIGINAL_CONNECTION_ID 0x00
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86 #define NGX_QUIC_TP_MAX_IDLE_TIMEOUT 0x01
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87 #define NGX_QUIC_TP_STATELESS_RESET_TOKEN 0x02
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88 #define NGX_QUIC_TP_MAX_PACKET_SIZE 0x03
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89 #define NGX_QUIC_TP_INITIAL_MAX_DATA 0x04
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90 #define NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL 0x05
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91 #define NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE 0x06
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92 #define NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI 0x07
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93 #define NGX_QUIC_TP_INITIAL_MAX_STREAMS_BIDI 0x08
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94 #define NGX_QUIC_TP_INITIAL_MAX_STREAMS_UNI 0x09
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95 #define NGX_QUIC_TP_ACK_DELAY_EXPONENT 0x0A
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96 #define NGX_QUIC_TP_MAX_ACK_DELAY 0x0B
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97 #define NGX_QUIC_TP_DISABLE_ACTIVE_MIGRATION 0x0C
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98 #define NGX_QUIC_TP_PREFERRED_ADDRESS 0x0D
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99 #define NGX_QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT 0x0E
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100
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101
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102 typedef struct {
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103 uint64_t largest;
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104 uint64_t delay;
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105 uint64_t range_count;
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106 uint64_t first_range;
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107 uint64_t ect0;
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108 uint64_t ect1;
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109 uint64_t ce;
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110 u_char *ranges_start;
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111 u_char *ranges_end;
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112 } ngx_quic_ack_frame_t;
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113
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114
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115 typedef struct {
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116 uint64_t seqnum;
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117 uint64_t retire;
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118 uint8_t len;
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119 u_char cid[20];
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120 u_char srt[16];
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121 } ngx_quic_new_conn_id_frame_t;
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122
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123
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124 /*
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125 * common layout for CRYPTO and STREAM frames;
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126 * conceptually, CRYPTO frame is also a stream
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127 * frame lacking some properties
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128 */
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129 typedef struct {
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130 uint64_t offset;
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131 uint64_t length;
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132 u_char *data;
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133 } ngx_quic_ordered_frame_t;
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134
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135 typedef ngx_quic_ordered_frame_t ngx_quic_crypto_frame_t;
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136
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137
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138 typedef struct {
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139 /* initial fields same as in ngx_quic_ordered_frame_t */
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140 uint64_t offset;
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141 uint64_t length;
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142 u_char *data;
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143
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144 uint8_t type;
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145 uint64_t stream_id;
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146 unsigned off:1;
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147 unsigned len:1;
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148 unsigned fin:1;
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149 } ngx_quic_stream_frame_t;
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150
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151
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152 typedef struct {
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153 uint64_t max_data;
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154 } ngx_quic_max_data_frame_t;
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155
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156
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157 typedef struct {
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158 uint64_t error_code;
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159 uint64_t frame_type;
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160 ngx_str_t reason;
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diff changeset
161 } ngx_quic_close_frame_t;
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162
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163
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164 typedef struct {
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165 uint64_t id;
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diff changeset
166 uint64_t error_code;
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diff changeset
167 uint64_t final_size;
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diff changeset
168 } ngx_quic_reset_stream_frame_t;
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169
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170
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171 typedef struct {
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172 uint64_t id;
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diff changeset
173 uint64_t error_code;
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diff changeset
174 } ngx_quic_stop_sending_frame_t;
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175
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176
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diff changeset
177 typedef struct {
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178 uint64_t limit;
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diff changeset
179 ngx_uint_t bidi; /* unsigned: bidi:1 */
d3b26c3bea22 Added parsing of STREAMS BLOCKED frames.
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180 } ngx_quic_streams_blocked_frame_t;
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181
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182
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183 typedef struct {
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184 uint64_t limit;
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185 ngx_uint_t bidi; /* unsigned: bidi:1 */
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diff changeset
186 } ngx_quic_max_streams_frame_t;
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187
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188
8257
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189 typedef struct {
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190 uint64_t id;
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diff changeset
191 uint64_t limit;
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192 } ngx_quic_max_stream_data_frame_t;
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193
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diff changeset
194
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195 typedef struct {
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196 uint64_t limit;
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197 } ngx_quic_data_blocked_frame_t;
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198
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diff changeset
199
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diff changeset
200 typedef struct {
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diff changeset
201 uint64_t id;
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diff changeset
202 uint64_t limit;
085fd6e68367 Implemented parsing of remaining frame types.
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diff changeset
203 } ngx_quic_stream_data_blocked_frame_t;
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diff changeset
204
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diff changeset
205
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diff changeset
206 typedef struct {
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diff changeset
207 uint64_t sequence_number;
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diff changeset
208 } ngx_quic_retire_cid_frame_t;
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diff changeset
209
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diff changeset
210
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diff changeset
211 typedef struct {
085fd6e68367 Implemented parsing of remaining frame types.
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diff changeset
212 u_char data[8];
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Vladimir Homutov <vl@nginx.com>
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diff changeset
213 } ngx_quic_path_challenge_frame_t;
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diff changeset
214
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diff changeset
215
8224
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diff changeset
216 typedef struct ngx_quic_frame_s ngx_quic_frame_t;
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diff changeset
217
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parents:
diff changeset
218 struct ngx_quic_frame_s {
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
219 ngx_uint_t type;
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
220 enum ssl_encryption_level_t level;
8308
e10b4c61420f Implemented retransmission and retransmit queue.
Vladimir Homutov <vl@nginx.com>
parents: 8307
diff changeset
221 ngx_queue_t queue;
e10b4c61420f Implemented retransmission and retransmit queue.
Vladimir Homutov <vl@nginx.com>
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diff changeset
222 uint64_t pnum;
e10b4c61420f Implemented retransmission and retransmit queue.
Vladimir Homutov <vl@nginx.com>
parents: 8307
diff changeset
223 ngx_msec_t first;
e10b4c61420f Implemented retransmission and retransmit queue.
Vladimir Homutov <vl@nginx.com>
parents: 8307
diff changeset
224 ngx_msec_t last;
e10b4c61420f Implemented retransmission and retransmit queue.
Vladimir Homutov <vl@nginx.com>
parents: 8307
diff changeset
225 ngx_uint_t need_ack;
e10b4c61420f Implemented retransmission and retransmit queue.
Vladimir Homutov <vl@nginx.com>
parents: 8307
diff changeset
226 /* unsigned need_ack:1; */
e10b4c61420f Implemented retransmission and retransmit queue.
Vladimir Homutov <vl@nginx.com>
parents: 8307
diff changeset
227
8286
c7185bc5b4d9 QUIC frames reuse.
Roman Arutyunyan <arut@nginx.com>
parents: 8285
diff changeset
228 u_char *data;
8224
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
229 union {
ae35ccba7aa6 Extracted transport part of the code into separate file.
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diff changeset
230 ngx_quic_ack_frame_t ack;
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
231 ngx_quic_crypto_frame_t crypto;
8333
167d32476737 Crypto buffer frames reordering.
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diff changeset
232 ngx_quic_ordered_frame_t ord;
8224
ae35ccba7aa6 Extracted transport part of the code into separate file.
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diff changeset
233 ngx_quic_new_conn_id_frame_t ncid;
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
234 ngx_quic_stream_frame_t stream;
8237
ff540f13d95d MAX_DATA frame parser/handler.
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parents: 8236
diff changeset
235 ngx_quic_max_data_frame_t max_data;
8224
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
236 ngx_quic_close_frame_t close;
8231
78540e2160d0 Added parsing of RESET_STREAM and STOP_SENDING frames
Vladimir Homutov <vl@nginx.com>
parents: 8224
diff changeset
237 ngx_quic_reset_stream_frame_t reset_stream;
78540e2160d0 Added parsing of RESET_STREAM and STOP_SENDING frames
Vladimir Homutov <vl@nginx.com>
parents: 8224
diff changeset
238 ngx_quic_stop_sending_frame_t stop_sending;
8236
d3b26c3bea22 Added parsing of STREAMS BLOCKED frames.
Vladimir Homutov <vl@nginx.com>
parents: 8231
diff changeset
239 ngx_quic_streams_blocked_frame_t streams_blocked;
8245
a14afe21e692 Double MAX_STREAMS on STREAMS_BLOCKED.
Roman Arutyunyan <arut@nginx.com>
parents: 8241
diff changeset
240 ngx_quic_max_streams_frame_t max_streams;
8257
085fd6e68367 Implemented parsing of remaining frame types.
Vladimir Homutov <vl@nginx.com>
parents: 8251
diff changeset
241 ngx_quic_max_stream_data_frame_t max_stream_data;
085fd6e68367 Implemented parsing of remaining frame types.
Vladimir Homutov <vl@nginx.com>
parents: 8251
diff changeset
242 ngx_quic_data_blocked_frame_t data_blocked;
085fd6e68367 Implemented parsing of remaining frame types.
Vladimir Homutov <vl@nginx.com>
parents: 8251
diff changeset
243 ngx_quic_stream_data_blocked_frame_t stream_data_blocked;
085fd6e68367 Implemented parsing of remaining frame types.
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parents: 8251
diff changeset
244 ngx_quic_retire_cid_frame_t retire_cid;
085fd6e68367 Implemented parsing of remaining frame types.
Vladimir Homutov <vl@nginx.com>
parents: 8251
diff changeset
245 ngx_quic_path_challenge_frame_t path_challenge;
085fd6e68367 Implemented parsing of remaining frame types.
Vladimir Homutov <vl@nginx.com>
parents: 8251
diff changeset
246 ngx_quic_path_challenge_frame_t path_response;
8224
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
247 } u;
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
248 u_char info[128]; // for debug
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
249 };
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
250
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
251
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
252 typedef struct {
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
253 ngx_log_t *log;
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
254
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
255 struct ngx_quic_secret_s *secret;
8319
29354c6fc5f2 TLS Key Update in QUIC.
Sergey Kandaurov <pluknet@nginx.com>
parents: 8315
diff changeset
256 struct ngx_quic_secret_s *next;
8307
dc7ac778aafe Introduced packet namespace in QUIC connection.
Vladimir Homutov <vl@nginx.com>
parents: 8298
diff changeset
257 uint64_t number;
8315
fdda518d10ba Proper handling of packet number in header.
Vladimir Homutov <vl@nginx.com>
parents: 8308
diff changeset
258 uint8_t num_len;
fdda518d10ba Proper handling of packet number in header.
Vladimir Homutov <vl@nginx.com>
parents: 8308
diff changeset
259 uint32_t trunc;
8240
1f002206a59b Added boundaries checks into frame parser.
Vladimir Homutov <vl@nginx.com>
parents: 8237
diff changeset
260 uint8_t flags;
8224
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
261 uint32_t version;
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
262 ngx_str_t token;
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
263 enum ssl_encryption_level_t level;
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
264
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
265 /* filled in by parser */
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
266 ngx_buf_t *raw; /* udp datagram */
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
267
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
268 u_char *data; /* quic packet */
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
269 size_t len;
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
270
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
271 /* cleartext fields */
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
272 ngx_str_t dcid;
ae35ccba7aa6 Extracted transport part of the code into separate file.
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parents:
diff changeset
273 ngx_str_t scid;
ae35ccba7aa6 Extracted transport part of the code into separate file.
Vladimir Homutov <vl@nginx.com>
parents:
diff changeset
274 uint64_t pn;
8288
ebd5c71b9f02 Got rid of memory allocation in decryption.
Vladimir Homutov <vl@nginx.com>
parents: 8286
diff changeset
275 u_char *plaintext;
ebd5c71b9f02 Got rid of memory allocation in decryption.
Vladimir Homutov <vl@nginx.com>
parents: 8286
diff changeset
276 ngx_str_t payload; /* decrypted data */
8308
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277
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278 unsigned need_ack:1;
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279 unsigned key_phase:1;
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280 unsigned key_update:1;
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281 } ngx_quic_header_t;
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282
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283
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284 u_char *ngx_quic_error_text(uint64_t error_code);
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285
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286 ngx_int_t ngx_quic_parse_long_header(ngx_quic_header_t *pkt);
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287 size_t ngx_quic_create_long_header(ngx_quic_header_t *pkt, u_char *out,
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288 size_t pkt_len, u_char **pnp);
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289
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290 ngx_int_t ngx_quic_parse_short_header(ngx_quic_header_t *pkt,
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291 ngx_str_t *dcid);
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292 size_t ngx_quic_create_short_header(ngx_quic_header_t *pkt, u_char *out,
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293 size_t pkt_len, u_char **pnp);
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294
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295 ngx_int_t ngx_quic_parse_initial_header(ngx_quic_header_t *pkt);
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296 ngx_int_t ngx_quic_parse_handshake_header(ngx_quic_header_t *pkt);
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297
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298 ssize_t ngx_quic_parse_frame(ngx_quic_header_t *pkt, u_char *start, u_char *end,
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299 ngx_quic_frame_t *frame);
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300 ssize_t ngx_quic_create_frame(u_char *p, ngx_quic_frame_t *f);
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301
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302 ssize_t ngx_quic_parse_ack_range(ngx_quic_header_t *pkt, u_char *start,
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303 u_char *end, uint64_t *gap, uint64_t *range);
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304
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305 ngx_int_t ngx_quic_parse_transport_params(u_char *p, u_char *end,
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306 ngx_quic_tp_t *tp, ngx_log_t *log);
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parents: 8245
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307 ssize_t ngx_quic_create_transport_params(u_char *p, u_char *end,
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308 ngx_quic_tp_t *tp);
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309
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310 #endif /* _NGX_EVENT_QUIC_WIRE_H_INCLUDED_ */