Mercurial > hg > nginx
annotate src/event/quic/ngx_event_quic_migration.c @ 8917:bb1d1d9d76e2 quic
QUIC: removed excessive check.
The c->udp->dgram may be NULL only if the quic connection was just
created: the ngx_event_udp_recvmsg() passes information about datagrams
to existing connections by providing information in c->udp.
If case of a new connection, c->udp is allocated by the QUIC code during
creation of quic connection (it uses c->sockaddr to initialize qsock->path).
Thus the check for qsock->path is excessive and can be read wrong, assuming
that other options possible, leading to warnings from clang static analyzer.
author | Vladimir Homutov <vl@nginx.com> |
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date | Wed, 01 Dec 2021 18:33:29 +0300 |
parents | 40445fc7c403 |
children | 501f28679d56 |
rev | line source |
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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 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 = ssl_encryption_application; |
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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 * RFC 9000, 8.2.2. Path Validation Responses |
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42 * |
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43 * A PATH_RESPONSE frame MUST be sent on the network path where the |
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44 * PATH_CHALLENGE frame was received. |
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45 */ |
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46 qsock = ngx_quic_get_socket(c); |
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47 path = qsock->path; |
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48 |
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49 /* |
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50 * An endpoint MUST expand datagrams that contain a PATH_RESPONSE frame |
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51 * to at least the smallest allowed maximum datagram size of 1200 bytes. |
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52 * ... |
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53 * An endpoint MUST NOT expand the datagram containing the PATH_RESPONSE |
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54 * if the resulting data exceeds the anti-amplification limit. |
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55 */ |
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56 if (path->state != NGX_QUIC_PATH_VALIDATED) { |
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57 max = path->received * 3; |
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58 max = (path->sent >= max) ? 0 : max - path->sent; |
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59 pad = ngx_min(1200, max); |
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60 |
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61 } else { |
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62 pad = 1200; |
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63 } |
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64 |
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65 sent = ngx_quic_frame_sendto(c, &frame, pad, path->sockaddr, path->socklen); |
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66 if (sent < 0) { |
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67 return NGX_ERROR; |
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68 } |
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69 |
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70 path->sent += sent; |
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71 |
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72 if (qsock == qc->socket) { |
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73 /* |
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74 * RFC 9000, 9.3.3. Off-Path Packet Forwarding |
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75 * |
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76 * An endpoint that receives a PATH_CHALLENGE on an active path SHOULD |
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77 * send a non-probing packet in response. |
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78 */ |
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79 |
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80 fp = ngx_quic_alloc_frame(c); |
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81 if (fp == NULL) { |
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82 return NGX_ERROR; |
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83 } |
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84 |
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85 fp->level = ssl_encryption_application; |
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86 fp->type = NGX_QUIC_FT_PING; |
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87 |
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88 ngx_quic_queue_frame(qc, fp); |
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89 } |
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90 |
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91 return NGX_OK; |
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92 } |
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93 |
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94 |
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95 ngx_int_t |
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96 ngx_quic_handle_path_response_frame(ngx_connection_t *c, |
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97 ngx_quic_path_challenge_frame_t *f) |
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98 { |
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99 ngx_queue_t *q; |
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100 ngx_quic_path_t *path, *prev; |
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101 ngx_quic_connection_t *qc; |
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102 |
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103 qc = ngx_quic_get_connection(c); |
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104 |
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105 /* |
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106 * RFC 9000, 8.2.3. Successful Path Validation |
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107 * |
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108 * A PATH_RESPONSE frame received on any network path validates the path |
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109 * on which the PATH_CHALLENGE was sent. |
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110 */ |
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111 |
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112 for (q = ngx_queue_head(&qc->paths); |
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113 q != ngx_queue_sentinel(&qc->paths); |
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114 q = ngx_queue_next(q)) |
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115 { |
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116 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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117 |
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118 if (path->state != NGX_QUIC_PATH_VALIDATING) { |
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119 continue; |
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120 } |
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|
121 |
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|
122 if (ngx_memcmp(path->challenge1, f->data, sizeof(f->data)) == 0 |
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|
123 || ngx_memcmp(path->challenge2, f->data, sizeof(f->data)) == 0) |
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|
124 { |
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diff
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|
125 goto valid; |
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diff
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|
126 } |
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changeset
|
127 } |
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changeset
|
128 |
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|
129 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
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|
130 "quic stale PATH_RESPONSE ignored"); |
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|
131 |
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|
132 return NGX_OK; |
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|
133 |
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diff
changeset
|
134 valid: |
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diff
changeset
|
135 |
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changeset
|
136 /* |
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|
137 * RFC 9000, 9.4. Loss Detection and Congestion Control |
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|
138 * |
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|
139 * On confirming a peer's ownership of its new address, |
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|
140 * an endpoint MUST immediately reset the congestion controller |
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|
141 * and round-trip time estimator for the new path to initial values |
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|
142 * unless the only change in the peer's address is its port number. |
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|
143 */ |
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|
144 |
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|
145 prev = qc->backup->path; |
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changeset
|
146 |
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|
147 if (ngx_cmp_sockaddr(prev->sockaddr, prev->socklen, |
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|
148 path->sockaddr, path->socklen, 0) |
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|
149 != NGX_OK) |
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|
150 { |
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changeset
|
151 /* address has changed */ |
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|
152 ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t)); |
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|
153 |
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|
154 qc->congestion.window = ngx_min(10 * qc->tp.max_udp_payload_size, |
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|
155 ngx_max(2 * qc->tp.max_udp_payload_size, |
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|
156 14720)); |
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|
157 qc->congestion.ssthresh = (size_t) -1; |
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|
158 qc->congestion.recovery_start = ngx_current_msec; |
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changeset
|
159 } |
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changeset
|
160 |
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changeset
|
161 /* |
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|
162 * RFC 9000, 9.3. Responding to Connection Migration |
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diff
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|
163 * |
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|
164 * After verifying a new client address, the server SHOULD |
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|
165 * send new address validation tokens (Section 8) to the client. |
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|
166 */ |
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changeset
|
167 |
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|
168 if (ngx_quic_send_new_token(c, path) != NGX_OK) { |
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|
169 return NGX_ERROR; |
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changeset
|
170 } |
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changeset
|
171 |
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|
172 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
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|
173 "quic path #%uL successfully validated", path->seqnum); |
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|
174 |
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|
175 path->state = NGX_QUIC_PATH_VALIDATED; |
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|
176 path->validated_at = ngx_time(); |
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|
177 |
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|
178 return NGX_OK; |
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changeset
|
179 } |
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changeset
|
180 |
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changeset
|
181 |
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diff
changeset
|
182 static ngx_quic_path_t * |
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|
183 ngx_quic_alloc_path(ngx_connection_t *c) |
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|
184 { |
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|
185 ngx_queue_t *q; |
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changeset
|
186 struct sockaddr *sa; |
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|
187 ngx_quic_path_t *path; |
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|
188 ngx_quic_connection_t *qc; |
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|
189 |
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|
190 qc = ngx_quic_get_connection(c); |
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changeset
|
191 |
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|
192 if (!ngx_queue_empty(&qc->free_paths)) { |
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changeset
|
193 |
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|
194 q = ngx_queue_head(&qc->free_paths); |
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|
195 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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|
196 |
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|
197 ngx_queue_remove(&path->queue); |
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|
198 |
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|
199 sa = path->sockaddr; |
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|
200 ngx_memzero(path, sizeof(ngx_quic_path_t)); |
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|
201 path->sockaddr = sa; |
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|
202 |
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|
203 } else { |
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|
204 |
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|
205 path = ngx_pcalloc(c->pool, sizeof(ngx_quic_path_t)); |
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|
206 if (path == NULL) { |
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changeset
|
207 return NULL; |
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diff
changeset
|
208 } |
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changeset
|
209 |
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|
210 path->sockaddr = ngx_palloc(c->pool, NGX_SOCKADDRLEN); |
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|
211 if (path->sockaddr == NULL) { |
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|
212 return NULL; |
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diff
changeset
|
213 } |
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diff
changeset
|
214 } |
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diff
changeset
|
215 |
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diff
changeset
|
216 return path; |
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diff
changeset
|
217 } |
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diff
changeset
|
218 |
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diff
changeset
|
219 |
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diff
changeset
|
220 ngx_quic_path_t * |
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|
221 ngx_quic_add_path(ngx_connection_t *c, struct sockaddr *sockaddr, |
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|
222 socklen_t socklen) |
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diff
changeset
|
223 { |
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changeset
|
224 ngx_quic_path_t *path; |
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changeset
|
225 ngx_quic_connection_t *qc; |
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changeset
|
226 |
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|
227 qc = ngx_quic_get_connection(c); |
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|
228 |
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changeset
|
229 path = ngx_quic_alloc_path(c); |
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|
230 if (path == NULL) { |
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changeset
|
231 return NULL; |
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diff
changeset
|
232 } |
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diff
changeset
|
233 |
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diff
changeset
|
234 path->seqnum = qc->path_seqnum++; |
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changeset
|
235 |
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changeset
|
236 path->socklen = socklen; |
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diff
changeset
|
237 ngx_memcpy(path->sockaddr, sockaddr, socklen); |
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diff
changeset
|
238 |
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changeset
|
239 path->addr_text.data = path->text; |
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changeset
|
240 path->addr_text.len = ngx_sock_ntop(sockaddr, socklen, path->text, |
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QUIC: connection migration.
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parents:
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diff
changeset
|
241 NGX_SOCKADDR_STRLEN, 1); |
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changeset
|
242 |
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diff
changeset
|
243 ngx_queue_insert_tail(&qc->paths, &path->queue); |
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changeset
|
244 |
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diff
changeset
|
245 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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changeset
|
246 "quic path #%uL created src:%V", |
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QUIC: connection migration.
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diff
changeset
|
247 path->seqnum, &path->addr_text); |
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diff
changeset
|
248 |
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diff
changeset
|
249 return path; |
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changeset
|
250 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
251 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
252 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
253 ngx_quic_path_t * |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
254 ngx_quic_find_path(ngx_connection_t *c, struct sockaddr *sockaddr, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
255 socklen_t socklen) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
256 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
257 ngx_queue_t *q; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
258 ngx_quic_path_t *path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
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diff
changeset
|
259 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
260 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
261 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
262 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
263 for (q = ngx_queue_head(&qc->paths); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
264 q != ngx_queue_sentinel(&qc->paths); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
265 q = ngx_queue_next(q)) |
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:
8747
diff
changeset
|
267 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
268 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
269 if (ngx_cmp_sockaddr(sockaddr, socklen, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
270 path->sockaddr, path->socklen, 1) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
271 == NGX_OK) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
272 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
273 return path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
274 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
275 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
276 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
277 return NULL; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
278 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
279 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
280 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
281 ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
282 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
|
283 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
284 off_t len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
285 ngx_quic_path_t *path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
286 ngx_quic_socket_t *qsock; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
287 ngx_quic_client_id_t *cid; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
288 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
289 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
290 qsock = ngx_quic_get_socket(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
291 |
8917
bb1d1d9d76e2
QUIC: removed excessive check.
Vladimir Homutov <vl@nginx.com>
parents:
8913
diff
changeset
|
292 if (c->udp->dgram == NULL) { |
8913
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
293 /* 1st ever packet in connection, path already exists */ |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
294 path = qsock->path; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
295 goto update; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
296 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
297 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
298 path = ngx_quic_find_path(c, c->udp->dgram->sockaddr, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
299 c->udp->dgram->socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
300 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
301 if (path == NULL) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
302 path = ngx_quic_add_path(c, c->udp->dgram->sockaddr, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
303 c->udp->dgram->socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
304 if (path == NULL) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
305 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
306 } |
8913
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
307 |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
308 if (qsock->path) { |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
309 /* NAT rebinding case: packet to same CID, but from new address */ |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
310 |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
311 ngx_quic_unref_path(c, qsock->path); |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
312 |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
313 qsock->path = path; |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
314 path->refcnt++; |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
315 |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
316 goto update; |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
317 } |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
318 |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
319 } else if (qsock->path) { |
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
320 goto update; |
8763
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 |
8777
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
323 /* prefer unused client IDs if available */ |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
324 cid = ngx_quic_next_client_id(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
325 if (cid == NULL) { |
8777
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
326 |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
327 /* try to reuse connection ID used on the same path */ |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
328 cid = ngx_quic_used_client_id(c, path); |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
329 if (cid == NULL) { |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
330 |
8777
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
331 qc = ngx_quic_get_connection(c); |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
332 qc->error = NGX_QUIC_ERR_CONNECTION_ID_LIMIT_ERROR; |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
333 qc->error_reason = "no available client ids for new path"; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
334 |
8777
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
335 ngx_log_error(NGX_LOG_ERR, c->log, 0, |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
336 "no available client ids for new path"); |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
337 |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
338 return NGX_ERROR; |
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
339 } |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
340 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
341 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
342 ngx_quic_connect(c, qsock, path, cid); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
343 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
344 update: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
345 |
8912
50d73bf20e73
QUIC: refactored multiple QUIC packets handling.
Vladimir Homutov <vl@nginx.com>
parents:
8901
diff
changeset
|
346 len = pkt->raw->last - pkt->raw->start; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
347 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
348 /* TODO: this may be too late in some cases; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
349 * for example, if error happens during decrypt(), we cannot |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
350 * send CC, if error happens in 1st packet, due to amplification |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
351 * limit, because path->received = 0 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
352 * |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
353 * should we account garbage as received or only decrypting packets? |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
354 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
355 path->received += len; |
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_debug6(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
358 "quic packet via #%uL:%uL:%uL" |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
359 " size:%O path recvd:%O sent:%O", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
360 qsock->sid.seqnum, qsock->cid->seqnum, path->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
361 len, path->received, path->sent); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
362 |
8737
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
363 return NGX_OK; |
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
364 } |
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
365 |
8763
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 static void |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
368 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
|
369 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
370 size_t len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
371 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
372 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
373 c->socklen = path->socklen; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
374 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
375 if (c->addr_text.data) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
376 len = ngx_min(c->addr_text.len, path->addr_text.len); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
377 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
378 ngx_memcpy(c->addr_text.data, path->addr_text.data, len); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
379 c->addr_text.len = len; |
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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
382 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
383 "quic send path set to #%uL addr:%V", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
384 path->seqnum, &path->addr_text); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
385 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
386 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
387 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
388 ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
389 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
|
390 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
391 ngx_quic_path_t *next; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
392 ngx_quic_socket_t *qsock; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
393 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
394 ngx_quic_connection_t *qc; |
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 /* got non-probing packet via non-active socket with different path */ |
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 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
399 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
400 /* current socket, different from active */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
401 qsock = ngx_quic_get_socket(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
402 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
403 next = qsock->path; /* going to migrate to this path... */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
404 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
405 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
406 "quic migration from #%uL:%uL:%uL (%s)" |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
407 " to #%uL:%uL:%uL (%s)", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
408 qc->socket->sid.seqnum, qc->socket->cid->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
409 qc->socket->path->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
410 ngx_quic_path_state_str(qc->socket->path), |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
411 qsock->sid.seqnum, qsock->cid->seqnum, next->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
412 ngx_quic_path_state_str(next)); |
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 switch (next->state) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
415 case NGX_QUIC_PATH_NEW: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
416 if (ngx_quic_validate_path(c, qsock) != NGX_OK) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
417 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
418 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
419 break; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
420 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
421 /* migration to previously known path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
422 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
423 case NGX_QUIC_PATH_VALIDATING: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
424 /* alredy validating, nothing to do */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
425 break; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
426 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
427 case NGX_QUIC_PATH_VALIDATED: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
428 /* if path is old enough, revalidate */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
429 if (ngx_time() - next->validated_at > NGX_QUIC_PATH_VALID_TIME) { |
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 next->state = NGX_QUIC_PATH_NEW; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
432 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
433 if (ngx_quic_validate_path(c, qsock) != NGX_OK) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
434 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
435 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
436 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
437 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
438 break; |
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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
441 ctx = ngx_quic_get_send_ctx(qc, pkt->level); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
442 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
443 /* |
8797
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
444 * RFC 9000, 9.3. Responding to Connection Migration |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
445 * |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
446 * 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
|
447 * response to the highest-numbered non-probing packet. |
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 if (pkt->pn != ctx->largest_pn) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
450 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
451 } |
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 /* switching connection to new path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
454 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
455 ngx_quic_set_connection_path(c, next); |
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 /* |
8797
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
458 * RFC 9000, 9.5. Privacy Implications of Connection Migration |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
459 * |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
460 * An endpoint MUST NOT reuse a connection ID when sending to |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
461 * more than one destination address. |
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 /* preserve valid path we are migrating from */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
465 if (qc->socket->path->state == NGX_QUIC_PATH_VALIDATED) { |
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 if (qc->backup) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
468 ngx_quic_close_socket(c, qc->backup); |
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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
471 qc->backup = qc->socket; |
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 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
474 "quic backup socket is now #%uL:%uL:%uL (%s)", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
475 qc->backup->sid.seqnum, qc->backup->cid->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
476 qc->backup->path->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
477 ngx_quic_path_state_str(qc->backup->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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
480 qc->socket = qsock; |
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 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
483 "quic active socket is now #%uL:%uL:%uL (%s)", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
484 qsock->sid.seqnum, qsock->cid->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
485 qsock->path->seqnum, ngx_quic_path_state_str(qsock->path)); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
486 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
487 return NGX_OK; |
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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
490 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
491 static ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
492 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
|
493 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
494 ngx_msec_t pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
495 ngx_quic_path_t *path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
496 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
497 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
498 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
499 qc = ngx_quic_get_connection(c); |
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 path = qsock->path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
502 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
503 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
504 "quic initiated validation of new path #%uL", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
505 path->seqnum); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
506 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
507 path->state = NGX_QUIC_PATH_VALIDATING; |
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 if (RAND_bytes(path->challenge1, 8) != 1) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
510 return NGX_ERROR; |
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 if (RAND_bytes(path->challenge2, 8) != 1) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
514 return NGX_ERROR; |
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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
517 if (ngx_quic_send_path_challenge(c, path) != NGX_OK) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
518 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
519 } |
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 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
522 pto = ngx_quic_pto(c, ctx); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
523 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
524 path->expires = ngx_current_msec + pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
525 path->tries = NGX_QUIC_PATH_RETRIES; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
526 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
527 if (!qc->path_validation.timer_set) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
528 ngx_add_timer(&qc->path_validation, pto); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
529 } |
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 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
532 } |
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 static ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
536 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
|
537 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
538 off_t max, pad; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
539 ssize_t sent; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
540 ngx_quic_frame_t frame; |
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 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
543 "quic path #%uL send path challenge tries:%ui", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
544 path->seqnum, path->tries); |
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 frame.level = ssl_encryption_application; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
547 frame.type = NGX_QUIC_FT_PATH_CHALLENGE; |
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 ngx_memcpy(frame.u.path_challenge.data, path->challenge1, 8); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
550 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
551 /* |
8797
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
552 * RFC 9000, 8.2.1. Initiating Path Validation |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
553 * |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
554 * An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
555 * 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
|
556 * unless the anti-amplification limit for the path does not permit |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
557 * sending a datagram of this size. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
558 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
559 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
560 /* same applies to PATH_RESPONSE frames */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
561 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
562 max = path->received * 3; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
563 max = (path->sent >= max) ? 0 : max - path->sent; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
564 pad = ngx_min(1200, max); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
565 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
566 sent = ngx_quic_frame_sendto(c, &frame, pad, path->sockaddr, path->socklen); |
8822
ad046179eb91
QUIC: handle EAGAIN properly on UDP sockets.
Vladimir Homutov <vl@nginx.com>
parents:
8797
diff
changeset
|
567 if (sent < 0) { |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
568 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
569 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
570 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
571 path->sent += sent; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
572 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
573 ngx_memcpy(frame.u.path_challenge.data, path->challenge2, 8); |
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 max = (path->sent >= max) ? 0 : max - path->sent; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
576 pad = ngx_min(1200, max); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
577 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
578 sent = ngx_quic_frame_sendto(c, &frame, pad, path->sockaddr, path->socklen); |
8822
ad046179eb91
QUIC: handle EAGAIN properly on UDP sockets.
Vladimir Homutov <vl@nginx.com>
parents:
8797
diff
changeset
|
579 if (sent < 0) { |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
580 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
581 } |
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 path->sent += sent; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
584 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
585 return NGX_OK; |
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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
588 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
589 void |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
590 ngx_quic_path_validation_handler(ngx_event_t *ev) |
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 ngx_msec_t now; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
593 ngx_queue_t *q; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
594 ngx_msec_int_t left, next, pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
595 ngx_quic_path_t *path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
596 ngx_connection_t *c; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
597 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
598 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
599 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
600 c = ev->data; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
601 qc = ngx_quic_get_connection(c); |
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 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
604 pto = ngx_quic_pto(c, ctx); |
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 next = -1; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
607 now = ngx_current_msec; |
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 for (q = ngx_queue_head(&qc->paths); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
610 q != ngx_queue_sentinel(&qc->paths); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
611 q = ngx_queue_next(q)) |
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 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
614 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
615 if (path->state != NGX_QUIC_PATH_VALIDATING) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
616 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
617 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
618 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
619 left = path->expires - now; |
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 if (left > 0) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
622 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
623 if (next == -1 || left < next) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
624 next = path->expires; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
625 } |
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 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
628 } |
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 if (--path->tries) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
631 path->expires = ngx_current_msec + pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
632 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
633 if (next == -1 || pto < next) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
634 next = pto; |
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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
637 /* retransmit */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
638 (void) ngx_quic_send_path_challenge(c, path); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
639 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
640 continue; |
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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
643 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
644 "quic path #%uL validation failed", path->seqnum); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
645 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
646 /* found expired path */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
647 |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
648 path->state = NGX_QUIC_PATH_NEW; |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
649 |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
650 /* |
8797
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
651 * RFC 9000, 9.4. Loss Detection and Congestion Control |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
652 * |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
653 * If the timer fires before the PATH_RESPONSE is received, the |
8797
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
654 * endpoint might send a new PATH_CHALLENGE and restart the timer for |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
655 * a longer period of time. This timer SHOULD be set as described in |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
656 * 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
|
657 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
658 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
659 if (qc->socket->path != path) { |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
660 /* the path was not actually used */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
661 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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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:
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diff
changeset
|
664 if (ngx_quic_path_restore(c) != NGX_OK) { |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
665 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH; |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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changeset
|
666 qc->error_reason = "no viable path"; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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changeset
|
667 ngx_quic_close_connection(c, NGX_ERROR); |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
668 return; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
669 } |
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:
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diff
changeset
|
671 |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
672 if (next != -1) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
673 ngx_add_timer(&qc->path_validation, next); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
674 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
675 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
676 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
677 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
678 static ngx_int_t |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
679 ngx_quic_path_restore(ngx_connection_t *c) |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
680 { |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
681 ngx_quic_socket_t *qsock; |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
682 ngx_quic_connection_t *qc; |
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QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
683 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
684 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
685 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
686 /* |
8797
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
687 * RFC 9000, 9.1. Probing a New Path |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
688 * |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
689 * Failure to validate a path does not cause the connection to end |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
690 * |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
691 * RFC 9000, 9.3.2. On-Path Address Spoofing |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
692 * |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
693 * To protect the connection from failing due to such a spurious |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
694 * migration, an endpoint MUST revert to using the last validated |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
695 * peer address when validation of a new peer address fails. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
696 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
697 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
698 if (qc->backup == NULL) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
699 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
700 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
701 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
702 qc->socket = qc->backup; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
703 qc->backup = NULL; |
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 qsock = qc->socket; |
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 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
708 "quic active socket is restored to #%uL:%uL:%uL" |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
709 " (%s), no backup", |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
710 qsock->sid.seqnum, qsock->cid->seqnum, qsock->path->seqnum, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
711 ngx_quic_path_state_str(qsock->path)); |
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 ngx_quic_set_connection_path(c, qsock->path); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
714 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
715 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
716 } |