Mercurial > hg > nginx
annotate src/event/quic/ngx_event_quic_migration.c @ 8763:4117aa7fa38e quic
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> |
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date | Thu, 29 Apr 2021 15:35:02 +0300 |
parents | c8bda5e1e662 |
children | d5f93733c17d |
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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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5 |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_event.h> |
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10 #include <ngx_event_quic_connection.h> |
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11 |
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12 |
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13 static void ngx_quic_set_connection_path(ngx_connection_t *c, |
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14 ngx_quic_path_t *path); |
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15 static ngx_int_t ngx_quic_validate_path(ngx_connection_t *c, |
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16 ngx_quic_socket_t *qsock); |
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17 static ngx_int_t ngx_quic_send_path_challenge(ngx_connection_t *c, |
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18 ngx_quic_path_t *path); |
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19 static ngx_int_t ngx_quic_path_restore(ngx_connection_t *c); |
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20 static ngx_quic_path_t *ngx_quic_alloc_path(ngx_connection_t *c); |
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21 |
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22 |
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23 ngx_int_t |
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24 ngx_quic_handle_path_challenge_frame(ngx_connection_t *c, |
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25 ngx_quic_header_t *pkt, ngx_quic_path_challenge_frame_t *f) |
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26 { |
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27 off_t max, pad; |
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28 ssize_t sent; |
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29 ngx_quic_path_t *path; |
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30 ngx_quic_frame_t frame, *fp; |
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31 ngx_quic_socket_t *qsock; |
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32 ngx_quic_connection_t *qc; |
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33 |
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34 qc = ngx_quic_get_connection(c); |
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35 |
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36 frame.level = pkt->level; |
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37 frame.type = NGX_QUIC_FT_PATH_RESPONSE; |
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38 frame.u.path_response = *f; |
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39 |
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40 /* |
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41 * A PATH_RESPONSE frame MUST be sent on the network path where the |
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42 * PATH_CHALLENGE was received. |
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43 */ |
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44 qsock = ngx_quic_get_socket(c); |
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45 path = qsock->path; |
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46 |
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47 /* |
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48 * An endpoint MUST NOT expand the datagram containing the PATH_RESPONSE |
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49 * if the resulting data exceeds the anti-amplification limit. |
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50 */ |
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51 max = path->received * 3; |
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52 max = (path->sent >= max) ? 0 : max - path->sent; |
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53 pad = ngx_min(1200, max); |
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54 |
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55 sent = ngx_quic_frame_sendto(c, &frame, pad, path->sockaddr, path->socklen); |
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56 if (sent == -1) { |
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57 return NGX_ERROR; |
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58 } |
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59 |
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60 path->sent += sent; |
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61 |
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62 if (qsock == qc->socket) { |
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63 /* |
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64 * An endpoint that receives a PATH_CHALLENGE on an active path SHOULD |
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65 * send a non-probing packet in response. |
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66 */ |
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67 |
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68 fp = ngx_quic_alloc_frame(c); |
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69 if (fp == NULL) { |
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70 return NGX_ERROR; |
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71 } |
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72 |
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73 fp->level = pkt->level; |
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74 fp->type = NGX_QUIC_FT_PING; |
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75 |
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76 ngx_quic_queue_frame(qc, fp); |
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77 } |
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78 |
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79 return NGX_OK; |
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80 } |
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81 |
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82 |
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83 ngx_int_t |
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84 ngx_quic_handle_path_response_frame(ngx_connection_t *c, |
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85 ngx_quic_header_t *pkt, ngx_quic_path_challenge_frame_t *f) |
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86 { |
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87 ngx_queue_t *q; |
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88 ngx_quic_path_t *path, *prev; |
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89 ngx_quic_connection_t *qc; |
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90 |
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91 qc = ngx_quic_get_connection(c); |
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92 |
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93 /* |
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94 * A PATH_RESPONSE frame received on any network path validates the path |
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95 * on which the PATH_CHALLENGE was sent. |
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96 */ |
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97 |
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98 for (q = ngx_queue_head(&qc->paths); |
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99 q != ngx_queue_sentinel(&qc->paths); |
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100 q = ngx_queue_next(q)) |
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101 { |
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102 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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103 |
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104 if (path->state != NGX_QUIC_PATH_VALIDATING) { |
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105 continue; |
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106 } |
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107 |
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108 if (ngx_memcmp(path->challenge1, f->data, sizeof(f->data)) == 0 |
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109 || ngx_memcmp(path->challenge2, f->data, sizeof(f->data)) == 0) |
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110 { |
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111 goto valid; |
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112 } |
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113 } |
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114 |
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115 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
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116 "quic stale PATH_RESPONSE ignored"); |
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117 |
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118 return NGX_OK; |
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119 |
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120 valid: |
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121 |
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122 /* |
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123 * On confirming a peer's ownership of its new address, |
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124 * an endpoint MUST immediately reset the congestion controller |
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125 * and round-trip time estimator for the new path |
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126 * to initial values |
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127 * ...unless the only change in the peer's address is its port number. |
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128 */ |
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129 |
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130 prev = qc->backup->path; |
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131 |
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132 if (ngx_cmp_sockaddr(prev->sockaddr, prev->socklen, |
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133 path->sockaddr, path->socklen, 0) |
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134 != NGX_OK) |
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135 { |
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136 /* address has changed */ |
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137 ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t)); |
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138 |
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139 qc->congestion.window = ngx_min(10 * qc->tp.max_udp_payload_size, |
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140 ngx_max(2 * qc->tp.max_udp_payload_size, |
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141 14720)); |
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142 qc->congestion.ssthresh = (size_t) -1; |
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143 qc->congestion.recovery_start = ngx_current_msec; |
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144 } |
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145 |
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|
146 /* |
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147 * After verifying a new client address, the server SHOULD |
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148 * send new address validation tokens (Section 8) to the client. |
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149 */ |
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150 |
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151 if (ngx_quic_send_new_token(c, path) != NGX_OK) { |
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152 return NGX_ERROR; |
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153 } |
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154 |
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155 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
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156 "quic path #%uL successfully validated", path->seqnum); |
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157 |
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158 path->state = NGX_QUIC_PATH_VALIDATED; |
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159 path->validated_at = ngx_time(); |
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160 |
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161 return NGX_OK; |
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|
162 } |
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|
163 |
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|
164 |
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165 static ngx_quic_path_t * |
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166 ngx_quic_alloc_path(ngx_connection_t *c) |
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167 { |
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168 ngx_queue_t *q; |
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|
169 struct sockaddr *sa; |
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170 ngx_quic_path_t *path; |
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171 ngx_quic_connection_t *qc; |
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172 |
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173 qc = ngx_quic_get_connection(c); |
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174 |
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175 if (!ngx_queue_empty(&qc->free_paths)) { |
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176 |
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177 q = ngx_queue_head(&qc->free_paths); |
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178 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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179 |
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180 ngx_queue_remove(&path->queue); |
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|
181 |
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182 sa = path->sockaddr; |
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183 ngx_memzero(path, sizeof(ngx_quic_path_t)); |
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184 path->sockaddr = sa; |
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185 |
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186 } else { |
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187 |
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188 path = ngx_pcalloc(c->pool, sizeof(ngx_quic_path_t)); |
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189 if (path == NULL) { |
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190 return NULL; |
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|
191 } |
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|
192 |
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193 path->sockaddr = ngx_palloc(c->pool, NGX_SOCKADDRLEN); |
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194 if (path->sockaddr == NULL) { |
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195 return NULL; |
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|
196 } |
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|
197 } |
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|
198 |
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199 return path; |
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|
200 } |
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|
201 |
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|
202 |
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203 ngx_quic_path_t * |
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204 ngx_quic_add_path(ngx_connection_t *c, struct sockaddr *sockaddr, |
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205 socklen_t socklen) |
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|
206 { |
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207 ngx_quic_path_t *path; |
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208 ngx_quic_connection_t *qc; |
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209 |
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210 qc = ngx_quic_get_connection(c); |
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|
211 |
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212 path = ngx_quic_alloc_path(c); |
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213 if (path == NULL) { |
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|
214 return NULL; |
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|
215 } |
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|
216 |
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217 path->seqnum = qc->path_seqnum++; |
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|
218 |
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|
219 path->socklen = socklen; |
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|
220 ngx_memcpy(path->sockaddr, sockaddr, socklen); |
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|
221 |
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222 path->addr_text.data = path->text; |
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223 path->addr_text.len = ngx_sock_ntop(sockaddr, socklen, path->text, |
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224 NGX_SOCKADDR_STRLEN, 1); |
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|
225 |
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226 ngx_queue_insert_tail(&qc->paths, &path->queue); |
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|
227 |
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228 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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229 "quic path #%uL created src:%V", |
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|
230 path->seqnum, &path->addr_text); |
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|
231 |
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|
232 return path; |
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|
233 } |
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|
234 |
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|
235 |
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|
236 ngx_quic_path_t * |
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|
237 ngx_quic_find_path(ngx_connection_t *c, struct sockaddr *sockaddr, |
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|
238 socklen_t socklen) |
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|
239 { |
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|
240 ngx_queue_t *q; |
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|
241 ngx_quic_path_t *path; |
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|
242 ngx_quic_connection_t *qc; |
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|
243 |
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|
244 qc = ngx_quic_get_connection(c); |
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|
245 |
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|
246 for (q = ngx_queue_head(&qc->paths); |
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|
247 q != ngx_queue_sentinel(&qc->paths); |
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248 q = ngx_queue_next(q)) |
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|
249 { |
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|
250 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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|
251 |
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252 if (ngx_cmp_sockaddr(sockaddr, socklen, |
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|
253 path->sockaddr, path->socklen, 1) |
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|
254 == NGX_OK) |
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|
255 { |
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changeset
|
256 return path; |
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diff
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|
257 } |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
258 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
259 |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
260 return NULL; |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
261 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
262 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
263 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
264 ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
265 ngx_quic_check_migration(ngx_connection_t *c, ngx_quic_header_t *pkt) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
266 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
267 ngx_quic_path_t *path; |
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QUIC: connection migration.
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changeset
|
268 ngx_quic_socket_t *qsock; |
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QUIC: connection migration.
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changeset
|
269 ngx_quic_connection_t *qc; |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
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diff
changeset
|
270 |
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diff
changeset
|
271 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
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diff
changeset
|
272 |
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QUIC: connection migration.
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changeset
|
273 qsock = ngx_quic_get_socket(c); |
4117aa7fa38e
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diff
changeset
|
274 |
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QUIC: connection migration.
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parents:
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diff
changeset
|
275 if (c->udp->dgram == NULL) { |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
276 /* 2nd QUIC packet in first UDP datagram */ |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
277 return NGX_OK; |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
278 } |
4117aa7fa38e
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
279 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
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diff
changeset
|
280 path = ngx_quic_find_path(c, c->udp->dgram->sockaddr, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
281 c->udp->dgram->socklen); |
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QUIC: connection migration.
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diff
changeset
|
282 if (path == NULL) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
283 /* packet comes from unknown path, possibly migration */ |
4117aa7fa38e
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Vladimir Homutov <vl@nginx.com>
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diff
changeset
|
284 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
285 if (qc->tp.disable_active_migration) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
286 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
287 "quic migration disabled, dropping packet " |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
288 "from unknown path"); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
289 return NGX_DECLINED; |
4117aa7fa38e
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
290 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
291 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
292 if (pkt->level != ssl_encryption_application) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
293 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
294 "quic too early migration attempt"); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
295 return NGX_DECLINED; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
296 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
297 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
298 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
299 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
300 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
301 /* packet from known path */ |
4117aa7fa38e
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
302 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
303 if (qsock->path == NULL) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
304 /* client switched to previously unused server id */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
305 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
306 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
307 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
308 if (path == qsock->path) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
309 /* regular packet to expected path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
310 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
311 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
312 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
313 /* client is trying to use server id already used on other path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
314 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
315 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
316 "quic attempt to use socket #%uL:%uL:%uL with path #%uL", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
317 qsock->sid.seqnum, qsock->cid->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
318 qsock->path->seqnum, path->seqnum); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
319 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
320 return NGX_DECLINED; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
321 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
322 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
323 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
324 ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
325 ngx_quic_update_paths(ngx_connection_t *c, ngx_quic_header_t *pkt) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
326 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
327 off_t len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
328 ngx_quic_path_t *path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
329 ngx_quic_socket_t *qsock; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
330 ngx_quic_client_id_t *cid; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
331 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
332 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
333 qsock = ngx_quic_get_socket(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
334 path = qsock->path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
335 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
336 if (path) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
337 goto update; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
338 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
339 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
340 path = ngx_quic_find_path(c, c->udp->dgram->sockaddr, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
341 c->udp->dgram->socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
342 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
343 if (path == NULL) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
344 path = ngx_quic_add_path(c, c->udp->dgram->sockaddr, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
345 c->udp->dgram->socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
346 if (path == NULL) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
347 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
348 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
349 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
350 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
351 cid = ngx_quic_next_client_id(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
352 if (cid == NULL) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
353 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
354 qc->error = NGX_QUIC_ERR_CONNECTION_ID_LIMIT_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
355 qc->error_reason = "no available client ids for new path"; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
356 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
357 ngx_log_error(NGX_LOG_ERR, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
358 "no available client ids for new path"); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
359 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
360 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
361 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
362 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
363 ngx_quic_connect(c, qsock, path, cid); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
364 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
365 update: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
366 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
367 if (pkt->raw->start == pkt->data) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
368 len = pkt->raw->last - pkt->raw->start; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
369 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
370 } else { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
371 len = 0; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
372 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
373 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
374 /* TODO: this may be too late in some cases; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
375 * for example, if error happens during decrypt(), we cannot |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
376 * send CC, if error happens in 1st packet, due to amplification |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
377 * limit, because path->received = 0 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
378 * |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
379 * should we account garbage as received or only decrypting packets? |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
380 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
381 path->received += len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
382 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
383 ngx_log_debug6(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
384 "quic packet via #%uL:%uL:%uL" |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
385 " size:%O path recvd:%O sent:%O", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
386 qsock->sid.seqnum, qsock->cid->seqnum, path->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
387 len, path->received, path->sent); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
388 |
8737
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
389 return NGX_OK; |
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
390 } |
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
391 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
392 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
393 static void |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
394 ngx_quic_set_connection_path(ngx_connection_t *c, ngx_quic_path_t *path) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
395 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
396 size_t len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
397 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
398 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
399 c->socklen = path->socklen; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
400 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
401 if (c->addr_text.data) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
402 len = ngx_min(c->addr_text.len, path->addr_text.len); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
403 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
404 ngx_memcpy(c->addr_text.data, path->addr_text.data, len); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
405 c->addr_text.len = len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
406 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
407 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
408 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
409 "quic send path set to #%uL addr:%V", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
410 path->seqnum, &path->addr_text); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
411 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
412 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
413 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
414 ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
415 ngx_quic_handle_migration(ngx_connection_t *c, ngx_quic_header_t *pkt) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
416 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
417 ngx_quic_path_t *next; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
418 ngx_quic_socket_t *qsock; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
419 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
420 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
421 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
422 /* got non-probing packet via non-active socket with different path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
423 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
424 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
425 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
426 /* current socket, different from active */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
427 qsock = ngx_quic_get_socket(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
428 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
429 next = qsock->path; /* going to migrate to this path... */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
430 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
431 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
432 "quic migration from #%uL:%uL:%uL (%s)" |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
433 " to #%uL:%uL:%uL (%s)", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
434 qc->socket->sid.seqnum, qc->socket->cid->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
435 qc->socket->path->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
436 ngx_quic_path_state_str(qc->socket->path), |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
437 qsock->sid.seqnum, qsock->cid->seqnum, next->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
438 ngx_quic_path_state_str(next)); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
439 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
440 switch (next->state) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
441 case NGX_QUIC_PATH_NEW: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
442 if (ngx_quic_validate_path(c, qsock) != NGX_OK) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
443 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
444 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
445 break; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
446 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
447 /* migration to previously known path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
448 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
449 case NGX_QUIC_PATH_VALIDATING: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
450 /* alredy validating, nothing to do */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
451 break; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
452 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
453 case NGX_QUIC_PATH_VALIDATED: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
454 /* if path is old enough, revalidate */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
455 if (ngx_time() - next->validated_at > NGX_QUIC_PATH_VALID_TIME) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
456 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
457 next->state = NGX_QUIC_PATH_NEW; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
458 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
459 if (ngx_quic_validate_path(c, qsock) != NGX_OK) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
460 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
461 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
462 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
463 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
464 break; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
465 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
466 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
467 ctx = ngx_quic_get_send_ctx(qc, pkt->level); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
468 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
469 /* |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
470 * An endpoint only changes the address to which it sends packets in |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
471 * response to the highest-numbered non-probing packet. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
472 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
473 if (pkt->pn != ctx->largest_pn) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
474 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
475 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
476 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
477 /* switching connection to new path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
478 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
479 ngx_quic_set_connection_path(c, next); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
480 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
481 /* |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
482 * An endpoint MUST NOT reuse a connection ID when sending to |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
483 * more than one destination address. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
484 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
485 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
486 /* preserve valid path we are migrating from */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
487 if (qc->socket->path->state == NGX_QUIC_PATH_VALIDATED) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
488 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
489 if (qc->backup) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
490 ngx_quic_close_socket(c, qc->backup); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
491 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
492 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
493 qc->backup = qc->socket; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
494 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
495 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
496 "quic backup socket is now #%uL:%uL:%uL (%s)", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
497 qc->backup->sid.seqnum, qc->backup->cid->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
498 qc->backup->path->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
499 ngx_quic_path_state_str(qc->backup->path)); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
500 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
501 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
502 qc->socket = qsock; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
503 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
504 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
505 "quic active socket is now #%uL:%uL:%uL (%s)", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
506 qsock->sid.seqnum, qsock->cid->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
507 qsock->path->seqnum, ngx_quic_path_state_str(qsock->path)); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
508 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
509 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
510 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
511 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
512 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
513 static ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
514 ngx_quic_validate_path(ngx_connection_t *c, ngx_quic_socket_t *qsock) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
515 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
516 ngx_msec_t pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
517 ngx_quic_path_t *path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
518 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
519 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
520 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
521 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
522 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
523 path = qsock->path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
524 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
525 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
526 "quic initiated validation of new path #%uL", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
527 path->seqnum); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
528 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
529 path->state = NGX_QUIC_PATH_VALIDATING; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
530 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
531 if (RAND_bytes(path->challenge1, 8) != 1) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
532 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
533 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
534 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
535 if (RAND_bytes(path->challenge2, 8) != 1) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
536 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
537 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
538 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
539 if (ngx_quic_send_path_challenge(c, path) != NGX_OK) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
540 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
541 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
542 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
543 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
544 pto = ngx_quic_pto(c, ctx); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
545 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
546 path->expires = ngx_current_msec + pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
547 path->tries = NGX_QUIC_PATH_RETRIES; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
548 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
549 if (!qc->path_validation.timer_set) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
550 ngx_add_timer(&qc->path_validation, pto); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
551 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
552 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
553 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
554 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
555 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
556 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
557 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
558 static ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
559 ngx_quic_send_path_challenge(ngx_connection_t *c, ngx_quic_path_t *path) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
560 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
561 off_t max, pad; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
562 ssize_t sent; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
563 ngx_quic_frame_t frame; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
564 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
565 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
566 "quic path #%uL send path challenge tries:%ui", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
567 path->seqnum, path->tries); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
568 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
569 frame.level = ssl_encryption_application; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
570 frame.type = NGX_QUIC_FT_PATH_CHALLENGE; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
571 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
572 ngx_memcpy(frame.u.path_challenge.data, path->challenge1, 8); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
573 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
574 /* |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
575 * An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
576 * to at least the smallest allowed maximum datagram size of 1200 bytes, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
577 * unless the anti-amplification limit for the path does not permit |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
578 * sending a datagram of this size. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
579 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
580 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
581 /* same applies to PATH_RESPONSE frames */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
582 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
583 max = path->received * 3; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
584 max = (path->sent >= max) ? 0 : max - path->sent; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
585 pad = ngx_min(1200, max); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
586 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
587 sent = ngx_quic_frame_sendto(c, &frame, pad, path->sockaddr, path->socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
588 if (sent == -1) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
589 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
590 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
591 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
592 path->sent += sent; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
593 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
594 ngx_memcpy(frame.u.path_challenge.data, path->challenge2, 8); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
595 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
596 max = (path->sent >= max) ? 0 : max - path->sent; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
597 pad = ngx_min(1200, max); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
598 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
599 sent = ngx_quic_frame_sendto(c, &frame, pad, path->sockaddr, path->socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
600 if (sent == -1) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
601 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
602 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
603 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
604 path->sent += sent; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
605 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
606 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
607 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
608 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
609 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
610 void |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
611 ngx_quic_path_validation_handler(ngx_event_t *ev) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
612 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
613 ngx_msec_t now; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
614 ngx_queue_t *q; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
615 ngx_msec_int_t left, next, pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
616 ngx_quic_path_t *path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
617 ngx_connection_t *c; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
618 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
619 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
620 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
621 c = ev->data; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
622 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
623 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
624 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
625 pto = ngx_quic_pto(c, ctx); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
626 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
627 next = -1; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
628 now = ngx_current_msec; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
629 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
630 for (q = ngx_queue_head(&qc->paths); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
631 q != ngx_queue_sentinel(&qc->paths); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
632 q = ngx_queue_next(q)) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
633 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
634 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
635 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
636 if (path->state != NGX_QUIC_PATH_VALIDATING) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
637 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
638 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
639 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
640 left = path->expires - now; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
641 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
642 if (left > 0) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
643 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
644 if (next == -1 || left < next) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
645 next = path->expires; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
646 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
647 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
648 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
649 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
650 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
651 if (--path->tries) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
652 path->expires = ngx_current_msec + pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
653 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
654 if (next == -1 || pto < next) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
655 next = pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
656 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
657 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
658 /* retransmit */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
659 (void) ngx_quic_send_path_challenge(c, path); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
660 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
661 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
662 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
663 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
664 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
665 "quic path #%uL validation failed", path->seqnum); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
666 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
667 /* found expired path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
668 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
669 path->state = NGX_QUIC_PATH_NEW; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
670 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
671 /* |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
672 * If the timer fires before the PATH_RESPONSE is received, the |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
673 * endpoint might send a new PATH_CHALLENGE, and restart the timer for |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
674 * a longer period of time. This timer SHOULD be set as described in |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
675 * Section 6.2.1 of [QUIC-RECOVERY] and MUST NOT be more aggressive. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
676 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
677 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
678 if (qc->socket->path != path) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
679 /* the path was not actually used */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
680 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
681 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
682 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
683 if (ngx_quic_path_restore(c) != NGX_OK) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
684 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
685 qc->error_reason = "no viable path"; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
686 ngx_quic_close_connection(c, NGX_ERROR); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
687 return; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
688 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
689 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
690 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
691 if (next != -1) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
692 ngx_add_timer(&qc->path_validation, next); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
693 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
694 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
695 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
696 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
697 static ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
698 ngx_quic_path_restore(ngx_connection_t *c) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
699 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
700 ngx_quic_socket_t *qsock; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
701 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
702 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
703 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
704 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
705 /* Failure to validate a path does not cause the connection to end */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
706 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
707 /* |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
708 * To protect the connection from failing due to such a spurious |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
709 * migration, an endpoint MUST revert to using the last validated |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
710 * peer address when validation of a new peer address fails. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
711 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
712 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
713 if (qc->backup == NULL) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
714 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
715 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
716 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
717 qc->socket = qc->backup; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
718 qc->backup = NULL; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
719 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
720 qsock = qc->socket; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
721 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
722 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
723 "quic active socket is restored to #%uL:%uL:%uL" |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
724 " (%s), no backup", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
725 qsock->sid.seqnum, qsock->cid->seqnum, qsock->path->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
726 ngx_quic_path_state_str(qsock->path)); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
727 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
728 ngx_quic_set_connection_path(c, qsock->path); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
729 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
730 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
731 } |