Mercurial > hg > nginx-quic
annotate src/event/quic/ngx_event_quic_migration.c @ 8721:501f28679d56 quic
QUIC: refactored ngx_quic_frame_sendto() function.
The function now takes path as an argument to deal with associated
restrictions and update sent counter.
author | Vladimir Homutov <vl@nginx.com> |
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date | Thu, 09 Dec 2021 12:40:14 +0300 |
parents | bb1d1d9d76e2 |
children | 02a9ad88e2df |
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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_path_challenge_frame_t *f) |
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26 { |
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27 ngx_quic_path_t *path; |
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28 ngx_quic_frame_t frame, *fp; |
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29 ngx_quic_socket_t *qsock; |
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30 ngx_quic_connection_t *qc; |
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31 |
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32 qc = ngx_quic_get_connection(c); |
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33 |
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34 frame.level = ssl_encryption_application; |
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35 frame.type = NGX_QUIC_FT_PATH_RESPONSE; |
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36 frame.u.path_response = *f; |
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37 |
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38 /* |
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39 * RFC 9000, 8.2.2. Path Validation Responses |
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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 frame 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 expand datagrams that contain a PATH_RESPONSE frame |
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49 * to at least the smallest allowed maximum datagram size of 1200 bytes. |
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50 */ |
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51 if (ngx_quic_frame_sendto(c, &frame, 1200, path) != NGX_OK) { |
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52 return NGX_ERROR; |
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53 } |
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54 |
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55 if (qsock == qc->socket) { |
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56 /* |
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57 * RFC 9000, 9.3.3. Off-Path Packet Forwarding |
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58 * |
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59 * An endpoint that receives a PATH_CHALLENGE on an active path SHOULD |
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60 * send a non-probing packet in response. |
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61 */ |
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62 |
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63 fp = ngx_quic_alloc_frame(c); |
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64 if (fp == NULL) { |
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65 return NGX_ERROR; |
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66 } |
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67 |
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68 fp->level = ssl_encryption_application; |
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69 fp->type = NGX_QUIC_FT_PING; |
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70 |
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71 ngx_quic_queue_frame(qc, fp); |
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72 } |
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73 |
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74 return NGX_OK; |
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75 } |
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76 |
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77 |
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78 ngx_int_t |
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79 ngx_quic_handle_path_response_frame(ngx_connection_t *c, |
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80 ngx_quic_path_challenge_frame_t *f) |
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81 { |
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82 ngx_queue_t *q; |
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83 ngx_quic_path_t *path, *prev; |
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84 ngx_quic_connection_t *qc; |
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85 |
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86 qc = ngx_quic_get_connection(c); |
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87 |
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88 /* |
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89 * RFC 9000, 8.2.3. Successful Path Validation |
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90 * |
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91 * A PATH_RESPONSE frame received on any network path validates the path |
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92 * on which the PATH_CHALLENGE was sent. |
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93 */ |
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94 |
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95 for (q = ngx_queue_head(&qc->paths); |
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96 q != ngx_queue_sentinel(&qc->paths); |
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97 q = ngx_queue_next(q)) |
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98 { |
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99 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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100 |
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101 if (path->state != NGX_QUIC_PATH_VALIDATING) { |
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102 continue; |
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103 } |
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104 |
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105 if (ngx_memcmp(path->challenge1, f->data, sizeof(f->data)) == 0 |
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106 || ngx_memcmp(path->challenge2, f->data, sizeof(f->data)) == 0) |
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107 { |
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108 goto valid; |
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109 } |
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110 } |
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111 |
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112 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
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113 "quic stale PATH_RESPONSE ignored"); |
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114 |
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115 return NGX_OK; |
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116 |
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117 valid: |
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118 |
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119 /* |
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120 * RFC 9000, 9.4. Loss Detection and Congestion Control |
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121 * |
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122 * On confirming a peer's ownership of its new address, |
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123 * an endpoint MUST immediately reset the congestion controller |
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124 * and round-trip time estimator for the new path to initial values |
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125 * unless the only change in the peer's address is its port number. |
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126 */ |
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|
127 |
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|
128 prev = qc->backup->path; |
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|
129 |
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130 if (ngx_cmp_sockaddr(prev->sockaddr, prev->socklen, |
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|
131 path->sockaddr, path->socklen, 0) |
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|
132 != NGX_OK) |
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|
133 { |
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|
134 /* address has changed */ |
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|
135 ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t)); |
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|
136 |
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|
137 qc->congestion.window = ngx_min(10 * qc->tp.max_udp_payload_size, |
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138 ngx_max(2 * qc->tp.max_udp_payload_size, |
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|
139 14720)); |
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|
140 qc->congestion.ssthresh = (size_t) -1; |
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141 qc->congestion.recovery_start = ngx_current_msec; |
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142 } |
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|
143 |
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|
144 /* |
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145 * RFC 9000, 9.3. Responding to Connection Migration |
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|
146 * |
8423
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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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diff
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|
191 } |
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changeset
|
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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changeset
|
198 |
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changeset
|
199 return path; |
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diff
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|
200 } |
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parents:
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diff
changeset
|
201 |
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changeset
|
202 |
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changeset
|
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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Vladimir Homutov <vl@nginx.com>
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|
206 { |
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changeset
|
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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changeset
|
212 path = ngx_quic_alloc_path(c); |
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|
213 if (path == NULL) { |
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Vladimir Homutov <vl@nginx.com>
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changeset
|
214 return NULL; |
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diff
changeset
|
215 } |
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diff
changeset
|
216 |
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changeset
|
217 path->seqnum = qc->path_seqnum++; |
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diff
changeset
|
218 |
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diff
changeset
|
219 path->socklen = socklen; |
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parents:
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diff
changeset
|
220 ngx_memcpy(path->sockaddr, sockaddr, socklen); |
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changeset
|
221 |
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diff
changeset
|
222 path->addr_text.data = path->text; |
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changeset
|
223 path->addr_text.len = ngx_sock_ntop(sockaddr, socklen, path->text, |
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diff
changeset
|
224 NGX_SOCKADDR_STRLEN, 1); |
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changeset
|
225 |
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diff
changeset
|
226 ngx_queue_insert_tail(&qc->paths, &path->queue); |
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|
227 |
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changeset
|
228 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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changeset
|
229 "quic path #%uL created src:%V", |
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diff
changeset
|
230 path->seqnum, &path->addr_text); |
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diff
changeset
|
231 |
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diff
changeset
|
232 return path; |
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parents:
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diff
changeset
|
233 } |
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parents:
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diff
changeset
|
234 |
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changeset
|
235 |
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diff
changeset
|
236 ngx_quic_path_t * |
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changeset
|
237 ngx_quic_find_path(ngx_connection_t *c, struct sockaddr *sockaddr, |
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parents:
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diff
changeset
|
238 socklen_t socklen) |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
239 { |
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diff
changeset
|
240 ngx_queue_t *q; |
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diff
changeset
|
241 ngx_quic_path_t *path; |
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changeset
|
242 ngx_quic_connection_t *qc; |
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diff
changeset
|
243 |
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parents:
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diff
changeset
|
244 qc = ngx_quic_get_connection(c); |
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diff
changeset
|
245 |
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parents:
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diff
changeset
|
246 for (q = ngx_queue_head(&qc->paths); |
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diff
changeset
|
247 q != ngx_queue_sentinel(&qc->paths); |
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diff
changeset
|
248 q = ngx_queue_next(q)) |
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diff
changeset
|
249 { |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
250 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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parents:
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diff
changeset
|
251 |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
252 if (ngx_cmp_sockaddr(sockaddr, socklen, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
253 path->sockaddr, path->socklen, 1) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
254 == NGX_OK) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
255 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
256 return path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
257 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
258 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
259 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
260 return NULL; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
261 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
262 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
263 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
264 ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
265 ngx_quic_update_paths(ngx_connection_t *c, ngx_quic_header_t *pkt) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
266 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
267 off_t len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
268 ngx_quic_path_t *path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
269 ngx_quic_socket_t *qsock; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
270 ngx_quic_client_id_t *cid; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
271 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
272 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
273 qsock = ngx_quic_get_socket(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
274 |
8706
bb1d1d9d76e2
QUIC: removed excessive check.
Vladimir Homutov <vl@nginx.com>
parents:
8702
diff
changeset
|
275 if (c->udp->dgram == NULL) { |
8702
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
276 /* 1st ever packet in connection, path already exists */ |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
277 path = qsock->path; |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
278 goto update; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
279 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
280 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
281 path = ngx_quic_find_path(c, c->udp->dgram->sockaddr, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
282 c->udp->dgram->socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
283 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
284 if (path == NULL) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
285 path = ngx_quic_add_path(c, c->udp->dgram->sockaddr, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
286 c->udp->dgram->socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
287 if (path == NULL) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
288 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
289 } |
8702
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
290 |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
291 if (qsock->path) { |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
292 /* NAT rebinding case: packet to same CID, but from new address */ |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
293 |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
294 ngx_quic_unref_path(c, qsock->path); |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
295 |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
296 qsock->path = path; |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
297 path->refcnt++; |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
298 |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
299 goto update; |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
300 } |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
301 |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
302 } else if (qsock->path) { |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8701
diff
changeset
|
303 goto update; |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
304 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
305 |
8437
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
306 /* prefer unused client IDs if available */ |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
307 cid = ngx_quic_next_client_id(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
308 if (cid == NULL) { |
8437
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
309 |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
310 /* try to reuse connection ID used on the same path */ |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
311 cid = ngx_quic_used_client_id(c, path); |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
312 if (cid == NULL) { |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
313 |
8437
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
314 qc = ngx_quic_get_connection(c); |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
315 qc->error = NGX_QUIC_ERR_CONNECTION_ID_LIMIT_ERROR; |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
316 qc->error_reason = "no available client ids for new path"; |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
317 |
8437
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
318 ngx_log_error(NGX_LOG_ERR, c->log, 0, |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
319 "no available client ids for new path"); |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
320 |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
321 return NGX_ERROR; |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8423
diff
changeset
|
322 } |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
323 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
324 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
325 ngx_quic_connect(c, qsock, path, cid); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
326 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
327 update: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
328 |
8701
50d73bf20e73
QUIC: refactored multiple QUIC packets handling.
Vladimir Homutov <vl@nginx.com>
parents:
8690
diff
changeset
|
329 len = pkt->raw->last - pkt->raw->start; |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
330 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
331 /* TODO: this may be too late in some cases; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
332 * for example, if error happens during decrypt(), we cannot |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
333 * send CC, if error happens in 1st packet, due to amplification |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
334 * limit, because path->received = 0 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
335 * |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
336 * should we account garbage as received or only decrypting packets? |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
337 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
338 path->received += len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
339 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
340 ngx_log_debug6(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
341 "quic packet via #%uL:%uL:%uL" |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
342 " size:%O path recvd:%O sent:%O", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
343 qsock->sid.seqnum, qsock->cid->seqnum, path->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
344 len, path->received, path->sent); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
345 |
8387
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
346 return NGX_OK; |
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
347 } |
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
348 |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
349 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
350 static void |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
351 ngx_quic_set_connection_path(ngx_connection_t *c, ngx_quic_path_t *path) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
352 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
353 size_t len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
354 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
355 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
356 c->socklen = path->socklen; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
357 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
358 if (c->addr_text.data) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
359 len = ngx_min(c->addr_text.len, path->addr_text.len); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
360 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
361 ngx_memcpy(c->addr_text.data, path->addr_text.data, len); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
362 c->addr_text.len = len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
363 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
364 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
365 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
366 "quic send path set to #%uL addr:%V", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
367 path->seqnum, &path->addr_text); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
368 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
369 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
370 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
371 ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
372 ngx_quic_handle_migration(ngx_connection_t *c, ngx_quic_header_t *pkt) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
373 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
374 ngx_quic_path_t *next; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
375 ngx_quic_socket_t *qsock; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
376 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
377 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
378 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
379 /* got non-probing packet via non-active socket with different path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
380 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
381 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
382 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
383 /* current socket, different from active */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
384 qsock = ngx_quic_get_socket(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
385 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
386 next = qsock->path; /* going to migrate to this path... */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
387 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
388 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
389 "quic migration from #%uL:%uL:%uL (%s)" |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
390 " to #%uL:%uL:%uL (%s)", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
391 qc->socket->sid.seqnum, qc->socket->cid->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
392 qc->socket->path->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
393 ngx_quic_path_state_str(qc->socket->path), |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
394 qsock->sid.seqnum, qsock->cid->seqnum, next->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
395 ngx_quic_path_state_str(next)); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
396 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
397 switch (next->state) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
398 case NGX_QUIC_PATH_NEW: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
399 if (ngx_quic_validate_path(c, qsock) != NGX_OK) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
400 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
401 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
402 break; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
403 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
404 /* migration to previously known path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
405 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
406 case NGX_QUIC_PATH_VALIDATING: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
407 /* alredy validating, nothing to do */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
408 break; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
409 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
410 case NGX_QUIC_PATH_VALIDATED: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
411 /* if path is old enough, revalidate */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
412 if (ngx_time() - next->validated_at > NGX_QUIC_PATH_VALID_TIME) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
413 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
414 next->state = NGX_QUIC_PATH_NEW; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
415 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
416 if (ngx_quic_validate_path(c, qsock) != NGX_OK) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
417 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
418 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
419 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
420 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
421 break; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
422 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
423 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
424 ctx = ngx_quic_get_send_ctx(qc, pkt->level); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
425 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
426 /* |
8498
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
427 * RFC 9000, 9.3. Responding to Connection Migration |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
428 * |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
429 * An endpoint only changes the address to which it sends packets in |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
430 * response to the highest-numbered non-probing packet. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
431 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
432 if (pkt->pn != ctx->largest_pn) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
433 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
434 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
435 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
436 /* switching connection to new path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
437 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
438 ngx_quic_set_connection_path(c, next); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
439 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
440 /* |
8498
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
441 * RFC 9000, 9.5. Privacy Implications of Connection Migration |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
442 * |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
443 * An endpoint MUST NOT reuse a connection ID when sending to |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
444 * more than one destination address. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
445 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
446 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
447 /* preserve valid path we are migrating from */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
448 if (qc->socket->path->state == NGX_QUIC_PATH_VALIDATED) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
449 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
450 if (qc->backup) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
451 ngx_quic_close_socket(c, qc->backup); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
452 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
453 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
454 qc->backup = qc->socket; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
455 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
456 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
457 "quic backup socket is now #%uL:%uL:%uL (%s)", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
458 qc->backup->sid.seqnum, qc->backup->cid->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
459 qc->backup->path->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
460 ngx_quic_path_state_str(qc->backup->path)); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
461 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
462 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
463 qc->socket = qsock; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
464 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
465 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
466 "quic active socket is now #%uL:%uL:%uL (%s)", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
467 qsock->sid.seqnum, qsock->cid->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
468 qsock->path->seqnum, ngx_quic_path_state_str(qsock->path)); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
469 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
470 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
471 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
472 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
473 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
474 static ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
475 ngx_quic_validate_path(ngx_connection_t *c, ngx_quic_socket_t *qsock) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
476 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
477 ngx_msec_t pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
478 ngx_quic_path_t *path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
479 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
480 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
481 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
482 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
483 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
484 path = qsock->path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
485 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
486 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
487 "quic initiated validation of new path #%uL", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
488 path->seqnum); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
489 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
490 path->state = NGX_QUIC_PATH_VALIDATING; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
491 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
492 if (RAND_bytes(path->challenge1, 8) != 1) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
493 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
494 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
495 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
496 if (RAND_bytes(path->challenge2, 8) != 1) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
497 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
498 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
499 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
500 if (ngx_quic_send_path_challenge(c, path) != NGX_OK) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
501 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
502 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
503 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
504 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
505 pto = ngx_quic_pto(c, ctx); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
506 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
507 path->expires = ngx_current_msec + pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
508 path->tries = NGX_QUIC_PATH_RETRIES; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
509 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
510 if (!qc->path_validation.timer_set) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
511 ngx_add_timer(&qc->path_validation, pto); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
512 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
513 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
514 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
515 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
516 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
517 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
518 static ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
519 ngx_quic_send_path_challenge(ngx_connection_t *c, ngx_quic_path_t *path) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
520 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
521 ngx_quic_frame_t frame; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
522 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
523 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
524 "quic path #%uL send path challenge tries:%ui", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
525 path->seqnum, path->tries); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
526 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
527 frame.level = ssl_encryption_application; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
528 frame.type = NGX_QUIC_FT_PATH_CHALLENGE; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
529 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
530 ngx_memcpy(frame.u.path_challenge.data, path->challenge1, 8); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
531 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
532 /* |
8498
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
533 * RFC 9000, 8.2.1. Initiating Path Validation |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
534 * |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
535 * An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
536 * to at least the smallest allowed maximum datagram size of 1200 bytes, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
537 * unless the anti-amplification limit for the path does not permit |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
538 * sending a datagram of this size. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
539 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
540 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
541 /* same applies to PATH_RESPONSE frames */ |
8721
501f28679d56
QUIC: refactored ngx_quic_frame_sendto() function.
Vladimir Homutov <vl@nginx.com>
parents:
8706
diff
changeset
|
542 if (ngx_quic_frame_sendto(c, &frame, 1200, path) != NGX_OK) { |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
543 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
544 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
545 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
546 ngx_memcpy(frame.u.path_challenge.data, path->challenge2, 8); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
547 |
8721
501f28679d56
QUIC: refactored ngx_quic_frame_sendto() function.
Vladimir Homutov <vl@nginx.com>
parents:
8706
diff
changeset
|
548 if (ngx_quic_frame_sendto(c, &frame, 1200, path) != NGX_OK) { |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
549 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
550 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
551 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
552 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
553 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
554 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
555 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
556 void |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
557 ngx_quic_path_validation_handler(ngx_event_t *ev) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
558 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
559 ngx_msec_t now; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
560 ngx_queue_t *q; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
561 ngx_msec_int_t left, next, pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
562 ngx_quic_path_t *path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
563 ngx_connection_t *c; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
564 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
565 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
566 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
567 c = ev->data; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
568 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
569 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
570 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
571 pto = ngx_quic_pto(c, ctx); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
572 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
573 next = -1; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
574 now = ngx_current_msec; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
575 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
576 for (q = ngx_queue_head(&qc->paths); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
577 q != ngx_queue_sentinel(&qc->paths); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
578 q = ngx_queue_next(q)) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
579 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
580 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
581 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
582 if (path->state != NGX_QUIC_PATH_VALIDATING) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
583 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
584 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
585 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
586 left = path->expires - now; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
587 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
588 if (left > 0) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
589 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
590 if (next == -1 || left < next) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
591 next = path->expires; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
592 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
593 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
594 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
595 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
596 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
597 if (--path->tries) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
598 path->expires = ngx_current_msec + pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
599 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
600 if (next == -1 || pto < next) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
601 next = pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
602 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
603 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
604 /* retransmit */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
605 (void) ngx_quic_send_path_challenge(c, path); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
606 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
607 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
608 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
609 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
610 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
611 "quic path #%uL validation failed", path->seqnum); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
612 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
613 /* found expired path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
614 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
615 path->state = NGX_QUIC_PATH_NEW; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
616 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
617 /* |
8498
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
618 * RFC 9000, 9.4. Loss Detection and Congestion Control |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
619 * |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
620 * If the timer fires before the PATH_RESPONSE is received, the |
8498
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
621 * endpoint might send a new PATH_CHALLENGE and restart the timer for |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
622 * a longer period of time. This timer SHOULD be set as described in |
8423
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
623 * Section 6.2.1 of [QUIC-RECOVERY] and MUST NOT be more aggressive. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
624 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
625 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
626 if (qc->socket->path != path) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
627 /* the path was not actually used */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
628 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
629 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
630 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
631 if (ngx_quic_path_restore(c) != NGX_OK) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
632 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
633 qc->error_reason = "no viable path"; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
634 ngx_quic_close_connection(c, NGX_ERROR); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8407
diff
changeset
|
635 return; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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changeset
|
636 } |
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Vladimir Homutov <vl@nginx.com>
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637 } |
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Vladimir Homutov <vl@nginx.com>
parents:
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changeset
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638 |
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Vladimir Homutov <vl@nginx.com>
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639 if (next != -1) { |
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parents:
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640 ngx_add_timer(&qc->path_validation, next); |
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Vladimir Homutov <vl@nginx.com>
parents:
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641 } |
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Vladimir Homutov <vl@nginx.com>
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changeset
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642 } |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
643 |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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changeset
|
644 |
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changeset
|
645 static ngx_int_t |
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646 ngx_quic_path_restore(ngx_connection_t *c) |
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Vladimir Homutov <vl@nginx.com>
parents:
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|
647 { |
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parents:
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|
648 ngx_quic_socket_t *qsock; |
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parents:
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649 ngx_quic_connection_t *qc; |
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Vladimir Homutov <vl@nginx.com>
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650 |
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parents:
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651 qc = ngx_quic_get_connection(c); |
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Vladimir Homutov <vl@nginx.com>
parents:
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changeset
|
652 |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
653 /* |
8498
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QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
654 * RFC 9000, 9.1. Probing a New Path |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
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diff
changeset
|
655 * |
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QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
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diff
changeset
|
656 * Failure to validate a path does not cause the connection to end |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
657 * |
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QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
658 * RFC 9000, 9.3.2. On-Path Address Spoofing |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8438
diff
changeset
|
659 * |
8423
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
660 * To protect the connection from failing due to such a spurious |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
661 * migration, an endpoint MUST revert to using the last validated |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
662 * peer address when validation of a new peer address fails. |
4117aa7fa38e
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
663 */ |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
664 |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
665 if (qc->backup == NULL) { |
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Vladimir Homutov <vl@nginx.com>
parents:
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|
666 return NGX_ERROR; |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
667 } |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
668 |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
669 qc->socket = qc->backup; |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
670 qc->backup = NULL; |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
671 |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
672 qsock = qc->socket; |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
673 |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
674 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
675 "quic active socket is restored to #%uL:%uL:%uL" |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
676 " (%s), no backup", |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
677 qsock->sid.seqnum, qsock->cid->seqnum, qsock->path->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
678 ngx_quic_path_state_str(qsock->path)); |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
679 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
680 ngx_quic_set_connection_path(c, qsock->path); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
681 |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
682 return NGX_OK; |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
683 } |