Mercurial > hg > nginx
annotate src/event/quic/ngx_event_quic_migration.c @ 9191:618132842e7c
QUIC: ignore duplicate PATH_CHALLENGE frames.
According to RFC 9000, an endpoint SHOULD NOT send multiple PATH_CHALLENGE
frames in a single packet. The change adds a check to enforce this claim to
optimize server behavior. Previously each PATH_CHALLENGE always resulted in a
single response datagram being sent to client. The effect of this was however
limited by QUIC flood protection.
Also, PATH_CHALLENGE is explicitly disabled in Initial and Handshake levels,
see RFC 9000, Table 3. However, technically it may be sent by client in 0-RTT
over a new path without actual migration, even though the migration itself is
prohibited during handshake. This allows client to coalesce multiple 0-RTT
packets each carrying a PATH_CHALLENGE and end up with multiple PATH_CHALLENGEs
per datagram. This again leads to suboptimal behavior, see above. Since the
purpose of sending PATH_CHALLENGE frames in 0-RTT is unclear, these frames are
now only allowed in 1-RTT. For 0-RTT they are silently ignored.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Wed, 22 Nov 2023 14:48:12 +0400 |
parents | 3a67dd34b6cc |
children | efcdaa66df2e |
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 #define NGX_QUIC_PATH_MTU_DELAY 100 |
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14 #define NGX_QUIC_PATH_MTU_PRECISION 16 |
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15 |
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16 |
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17 static void ngx_quic_set_connection_path(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_validate_path(ngx_connection_t *c, |
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20 ngx_quic_path_t *path); |
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21 static ngx_int_t ngx_quic_send_path_challenge(ngx_connection_t *c, |
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22 ngx_quic_path_t *path); |
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23 static void ngx_quic_set_path_timer(ngx_connection_t *c); |
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24 static ngx_int_t ngx_quic_expire_path_validation(ngx_connection_t *c, |
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25 ngx_quic_path_t *path); |
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26 static ngx_int_t ngx_quic_expire_path_mtu_delay(ngx_connection_t *c, |
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27 ngx_quic_path_t *path); |
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28 static ngx_int_t ngx_quic_expire_path_mtu_discovery(ngx_connection_t *c, |
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29 ngx_quic_path_t *path); |
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30 static ngx_quic_path_t *ngx_quic_get_path(ngx_connection_t *c, ngx_uint_t tag); |
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31 static ngx_int_t ngx_quic_send_path_mtu_probe(ngx_connection_t *c, |
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32 ngx_quic_path_t *path); |
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33 |
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34 |
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35 ngx_int_t |
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36 ngx_quic_handle_path_challenge_frame(ngx_connection_t *c, |
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37 ngx_quic_header_t *pkt, ngx_quic_path_challenge_frame_t *f) |
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38 { |
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39 size_t min; |
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40 ngx_quic_frame_t frame, *fp; |
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41 ngx_quic_connection_t *qc; |
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42 |
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43 if (pkt->level != ssl_encryption_application || pkt->path_challenged) { |
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44 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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45 "quic ignoring PATH_CHALLENGE"); |
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46 return NGX_OK; |
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47 } |
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48 |
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49 pkt->path_challenged = 1; |
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50 |
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51 qc = ngx_quic_get_connection(c); |
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52 |
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53 ngx_memzero(&frame, sizeof(ngx_quic_frame_t)); |
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54 |
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55 frame.level = ssl_encryption_application; |
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56 frame.type = NGX_QUIC_FT_PATH_RESPONSE; |
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57 frame.u.path_response = *f; |
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58 |
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59 /* |
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60 * RFC 9000, 8.2.2. Path Validation Responses |
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61 * |
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62 * A PATH_RESPONSE frame MUST be sent on the network path where the |
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63 * PATH_CHALLENGE frame was received. |
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64 */ |
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65 |
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66 /* |
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67 * An endpoint MUST expand datagrams that contain a PATH_RESPONSE frame |
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68 * to at least the smallest allowed maximum datagram size of 1200 bytes. |
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69 * ... |
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70 * However, an endpoint MUST NOT expand the datagram containing the |
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71 * PATH_RESPONSE if the resulting data exceeds the anti-amplification limit. |
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72 */ |
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73 |
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74 min = (ngx_quic_path_limit(c, pkt->path, 1200) < 1200) ? 0 : 1200; |
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75 |
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76 if (ngx_quic_frame_sendto(c, &frame, min, pkt->path) == NGX_ERROR) { |
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77 return NGX_ERROR; |
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78 } |
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79 |
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80 if (pkt->path == qc->path) { |
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81 /* |
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82 * RFC 9000, 9.3.3. Off-Path Packet Forwarding |
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83 * |
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84 * An endpoint that receives a PATH_CHALLENGE on an active path SHOULD |
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85 * send a non-probing packet in response. |
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86 */ |
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87 |
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88 fp = ngx_quic_alloc_frame(c); |
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89 if (fp == NULL) { |
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90 return NGX_ERROR; |
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91 } |
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92 |
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93 fp->level = ssl_encryption_application; |
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94 fp->type = NGX_QUIC_FT_PING; |
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95 |
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96 ngx_quic_queue_frame(qc, fp); |
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97 } |
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98 |
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99 return NGX_OK; |
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100 } |
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101 |
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102 |
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103 ngx_int_t |
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104 ngx_quic_handle_path_response_frame(ngx_connection_t *c, |
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105 ngx_quic_path_challenge_frame_t *f) |
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106 { |
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107 ngx_uint_t rst; |
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108 ngx_queue_t *q; |
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109 ngx_quic_path_t *path, *prev; |
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110 ngx_quic_connection_t *qc; |
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111 |
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112 qc = ngx_quic_get_connection(c); |
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113 |
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|
114 /* |
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|
115 * RFC 9000, 8.2.3. Successful Path Validation |
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|
116 * |
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|
117 * A PATH_RESPONSE frame received on any network path validates the path |
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|
118 * on which the PATH_CHALLENGE was sent. |
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diff
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|
119 */ |
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changeset
|
120 |
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|
121 for (q = ngx_queue_head(&qc->paths); |
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|
122 q != ngx_queue_sentinel(&qc->paths); |
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|
123 q = ngx_queue_next(q)) |
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|
124 { |
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|
125 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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|
126 |
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|
127 if (path->state != NGX_QUIC_PATH_VALIDATING) { |
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|
128 continue; |
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|
129 } |
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|
130 |
9189
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diff
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|
131 if (ngx_memcmp(path->challenge[0], f->data, sizeof(f->data)) == 0 |
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|
132 || ngx_memcmp(path->challenge[1], f->data, sizeof(f->data)) == 0) |
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|
133 { |
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|
134 goto valid; |
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|
135 } |
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|
136 } |
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|
137 |
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|
138 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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QUIC: fixed indentation.
Sergey Kandaurov <pluknet@nginx.com>
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|
139 "quic stale PATH_RESPONSE ignored"); |
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140 |
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|
141 return NGX_OK; |
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|
142 |
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|
143 valid: |
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|
144 |
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|
145 /* |
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|
146 * RFC 9000, 9.4. Loss Detection and Congestion Control |
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|
147 * |
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148 * On confirming a peer's ownership of its new address, |
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149 * an endpoint MUST immediately reset the congestion controller |
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|
150 * and round-trip time estimator for the new path to initial values |
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|
151 * unless the only change in the peer's address is its port number. |
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152 */ |
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153 |
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|
154 rst = 1; |
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|
155 |
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|
156 prev = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP); |
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|
157 |
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|
158 if (prev != NULL) { |
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|
159 |
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|
160 if (ngx_cmp_sockaddr(prev->sockaddr, prev->socklen, |
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|
161 path->sockaddr, path->socklen, 0) |
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|
162 == NGX_OK) |
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|
163 { |
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|
164 /* address did not change */ |
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|
165 rst = 0; |
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|
166 |
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|
167 path->mtu = prev->mtu; |
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|
168 path->max_mtu = prev->max_mtu; |
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|
169 } |
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|
170 } |
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|
171 |
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|
172 if (rst) { |
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|
173 ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t)); |
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|
174 |
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|
175 qc->congestion.window = ngx_min(10 * qc->tp.max_udp_payload_size, |
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176 ngx_max(2 * qc->tp.max_udp_payload_size, |
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|
177 14720)); |
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|
178 qc->congestion.ssthresh = (size_t) -1; |
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|
179 qc->congestion.recovery_start = ngx_current_msec; |
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|
180 } |
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|
181 |
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changeset
|
182 /* |
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|
183 * RFC 9000, 9.3. Responding to Connection Migration |
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|
184 * |
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185 * After verifying a new client address, the server SHOULD |
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|
186 * send new address validation tokens (Section 8) to the client. |
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|
187 */ |
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|
188 |
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|
189 if (ngx_quic_send_new_token(c, path) != NGX_OK) { |
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|
190 return NGX_ERROR; |
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changeset
|
191 } |
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changeset
|
192 |
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|
193 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
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diff
changeset
|
194 "quic path seq:%uL addr:%V successfully validated", |
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|
195 path->seqnum, &path->addr_text); |
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|
196 |
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|
197 ngx_quic_path_dbg(c, "is validated", path); |
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|
198 |
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changeset
|
199 path->validated = 1; |
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|
200 |
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Roman Arutyunyan <arut@nginx.com>
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diff
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|
201 ngx_quic_discover_path_mtu(c, path); |
9098
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diff
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|
202 |
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|
203 return NGX_OK; |
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diff
changeset
|
204 } |
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changeset
|
205 |
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|
206 |
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|
207 ngx_quic_path_t * |
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changeset
|
208 ngx_quic_new_path(ngx_connection_t *c, |
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|
209 struct sockaddr *sockaddr, socklen_t socklen, ngx_quic_client_id_t *cid) |
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changeset
|
210 { |
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|
211 ngx_queue_t *q; |
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changeset
|
212 ngx_quic_path_t *path; |
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|
213 ngx_quic_connection_t *qc; |
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|
214 |
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changeset
|
215 qc = ngx_quic_get_connection(c); |
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|
216 |
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changeset
|
217 if (!ngx_queue_empty(&qc->free_paths)) { |
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|
218 |
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changeset
|
219 q = ngx_queue_head(&qc->free_paths); |
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|
220 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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|
221 |
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|
222 ngx_queue_remove(&path->queue); |
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|
223 |
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changeset
|
224 ngx_memzero(path, sizeof(ngx_quic_path_t)); |
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|
225 |
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changeset
|
226 } else { |
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|
227 |
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changeset
|
228 path = ngx_pcalloc(c->pool, sizeof(ngx_quic_path_t)); |
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|
229 if (path == NULL) { |
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|
230 return NULL; |
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changeset
|
231 } |
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changeset
|
232 } |
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changeset
|
233 |
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changeset
|
234 ngx_queue_insert_tail(&qc->paths, &path->queue); |
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|
235 |
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changeset
|
236 path->cid = cid; |
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changeset
|
237 cid->used = 1; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
238 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
239 path->seqnum = qc->path_seqnum++; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
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diff
changeset
|
240 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
241 path->sockaddr = &path->sa.sockaddr; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
242 path->socklen = socklen; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
243 ngx_memcpy(path->sockaddr, sockaddr, socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
244 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
245 path->addr_text.data = path->text; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
246 path->addr_text.len = ngx_sock_ntop(sockaddr, socklen, path->text, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
247 NGX_SOCKADDR_STRLEN, 1); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
248 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
249 path->mtu = NGX_QUIC_MIN_INITIAL_SIZE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
250 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
251 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
8997
fab36e4abf83
QUIC: got rid of hash symbol in backup and logging.
Vladimir Homutov <vl@nginx.com>
parents:
8985
diff
changeset
|
252 "quic path seq:%uL created addr:%V", |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
253 path->seqnum, &path->addr_text); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
254 return path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
255 } |
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 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
258 static ngx_quic_path_t * |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
259 ngx_quic_get_path(ngx_connection_t *c, ngx_uint_t tag) |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
260 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
261 ngx_queue_t *q; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
262 ngx_quic_path_t *path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
263 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
264 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
265 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
266 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
267 for (q = ngx_queue_head(&qc->paths); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
268 q != ngx_queue_sentinel(&qc->paths); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
269 q = ngx_queue_next(q)) |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
270 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
271 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
272 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
273 if (path->tag == tag) { |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
274 return path; |
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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
278 return NULL; |
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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
282 ngx_int_t |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
283 ngx_quic_set_path(ngx_connection_t *c, ngx_quic_header_t *pkt) |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
284 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
285 off_t len; |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
286 ngx_queue_t *q; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
287 ngx_quic_path_t *path, *probe; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
288 ngx_quic_socket_t *qsock; |
8972
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
289 ngx_quic_send_ctx_t *ctx; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
290 ngx_quic_client_id_t *cid; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
291 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
292 |
8939
ddd5e5c0f87d
QUIC: improved path validation.
Vladimir Homutov <vl@nginx.com>
parents:
8933
diff
changeset
|
293 qc = ngx_quic_get_connection(c); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
294 qsock = ngx_quic_get_socket(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
295 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
296 len = pkt->raw->last - pkt->raw->start; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
297 |
9017
c2f5d79cde64
QUIC: separate UDP framework for QUIC.
Roman Arutyunyan <arut@nginx.com>
parents:
9015
diff
changeset
|
298 if (c->udp->buffer == NULL) { |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
299 /* first ever packet in connection, path already exists */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
300 path = qc->path; |
8913
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
301 goto update; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
302 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
303 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
304 probe = NULL; |
8777
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
305 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
306 for (q = ngx_queue_head(&qc->paths); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
307 q != ngx_queue_sentinel(&qc->paths); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
308 q = ngx_queue_next(q)) |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
309 { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
310 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
311 |
9017
c2f5d79cde64
QUIC: separate UDP framework for QUIC.
Roman Arutyunyan <arut@nginx.com>
parents:
9015
diff
changeset
|
312 if (ngx_cmp_sockaddr(&qsock->sockaddr.sockaddr, qsock->socklen, |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
313 path->sockaddr, path->socklen, 1) |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
314 == NGX_OK) |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
315 { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
316 goto update; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
317 } |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
318 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
319 if (path->tag == NGX_QUIC_PATH_PROBE) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
320 probe = path; |
8777
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
321 } |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
322 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
323 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
324 /* packet from new path, drop current probe, if any */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
325 |
8972
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
326 ctx = ngx_quic_get_send_ctx(qc, pkt->level); |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
327 |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
328 /* |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
329 * only accept highest-numbered packets to prevent connection id |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
330 * exhaustion by excessive probing packets from unknown paths |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
331 */ |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
332 if (pkt->pn != ctx->largest_pn) { |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
333 return NGX_DONE; |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
334 } |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
335 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
336 if (probe && ngx_quic_free_path(c, probe) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
337 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
338 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
339 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
340 /* new path requires new client id */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
341 cid = ngx_quic_next_client_id(c); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
342 if (cid == NULL) { |
9029
28fc35b71d75
QUIC: "info" logging level on insufficient client connection ids.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9017
diff
changeset
|
343 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
344 "quic no available client ids for new path"); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
345 /* stop processing of this datagram */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
346 return NGX_DONE; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
347 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
348 |
9017
c2f5d79cde64
QUIC: separate UDP framework for QUIC.
Roman Arutyunyan <arut@nginx.com>
parents:
9015
diff
changeset
|
349 path = ngx_quic_new_path(c, &qsock->sockaddr.sockaddr, qsock->socklen, cid); |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
350 if (path == NULL) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
351 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
352 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
353 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
354 path->tag = NGX_QUIC_PATH_PROBE; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
355 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
356 /* |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
357 * client arrived using new path and previously seen DCID, |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
358 * this indicates NAT rebinding (or bad client) |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
359 */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
360 if (qsock->used) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
361 pkt->rebound = 1; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
362 } |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
363 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
364 update: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
365 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
366 qsock->used = 1; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
367 pkt->path = path; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
368 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
369 /* TODO: this may be too late in some cases; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
370 * for example, if error happens during decrypt(), we cannot |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
371 * send CC, if error happens in 1st packet, due to amplification |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
372 * limit, because path->received = 0 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
373 * |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
374 * should we account garbage as received or only decrypting packets? |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
375 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
376 path->received += len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
377 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
378 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
8997
fab36e4abf83
QUIC: got rid of hash symbol in backup and logging.
Vladimir Homutov <vl@nginx.com>
parents:
8985
diff
changeset
|
379 "quic packet len:%O via sock seq:%L path seq:%uL", |
8985
da24a78720eb
QUIC: fixed handling of initial source connection id.
Vladimir Homutov <vl@nginx.com>
parents:
8972
diff
changeset
|
380 len, (int64_t) qsock->sid.seqnum, path->seqnum); |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
381 ngx_quic_path_dbg(c, "status", path); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
382 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
383 return NGX_OK; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
384 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
385 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
386 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
387 ngx_int_t |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
388 ngx_quic_free_path(ngx_connection_t *c, ngx_quic_path_t *path) |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
389 { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
390 ngx_quic_connection_t *qc; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
391 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
392 qc = ngx_quic_get_connection(c); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
393 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
394 ngx_queue_remove(&path->queue); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
395 ngx_queue_insert_head(&qc->free_paths, &path->queue); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
396 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
397 /* |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
398 * invalidate CID that is no longer usable for any other path; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
399 * this also requests new CIDs from client |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
400 */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
401 if (path->cid) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
402 if (ngx_quic_free_client_id(c, path->cid) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
403 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
404 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
405 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
406 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
407 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
8997
fab36e4abf83
QUIC: got rid of hash symbol in backup and logging.
Vladimir Homutov <vl@nginx.com>
parents:
8985
diff
changeset
|
408 "quic path seq:%uL addr:%V retired", |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
409 path->seqnum, &path->addr_text); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
410 |
8737
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
411 return NGX_OK; |
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
412 } |
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
413 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
414 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
415 static void |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
416 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
|
417 { |
9015
a2fbae359828
QUIC: fixed indentation.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8997
diff
changeset
|
418 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
419 c->socklen = path->socklen; |
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 if (c->addr_text.data) { |
9099
9462c514a653
QUIC: fixed addr_text after migration (ticket #2488).
Roman Arutyunyan <arut@nginx.com>
parents:
9098
diff
changeset
|
422 c->addr_text.len = ngx_sock_ntop(c->sockaddr, c->socklen, |
9462c514a653
QUIC: fixed addr_text after migration (ticket #2488).
Roman Arutyunyan <arut@nginx.com>
parents:
9098
diff
changeset
|
423 c->addr_text.data, |
9462c514a653
QUIC: fixed addr_text after migration (ticket #2488).
Roman Arutyunyan <arut@nginx.com>
parents:
9098
diff
changeset
|
424 c->listening->addr_text_max_len, 0); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
425 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
426 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
427 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
8997
fab36e4abf83
QUIC: got rid of hash symbol in backup and logging.
Vladimir Homutov <vl@nginx.com>
parents:
8985
diff
changeset
|
428 "quic send path set to seq:%uL addr:%V", |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
429 path->seqnum, &path->addr_text); |
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 |
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 ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
434 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
|
435 { |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
436 ngx_quic_path_t *next, *bkp; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
437 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
438 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
439 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
440 /* got non-probing packet via non-active path */ |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
441 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
442 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
443 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
444 ctx = ngx_quic_get_send_ctx(qc, pkt->level); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
445 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
446 /* |
8797
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
447 * RFC 9000, 9.3. Responding to Connection Migration |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
448 * |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
449 * 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
|
450 * response to the highest-numbered non-probing packet. |
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 if (pkt->pn != ctx->largest_pn) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
453 return NGX_OK; |
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 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
456 next = pkt->path; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
457 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
458 /* |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
459 * RFC 9000, 9.3.3: |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
460 * |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
461 * In response to an apparent migration, endpoints MUST validate the |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
462 * previously active path using a PATH_CHALLENGE frame. |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
463 */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
464 if (pkt->rebound) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
465 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
466 /* NAT rebinding: client uses new path with old SID */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
467 if (ngx_quic_validate_path(c, qc->path) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
468 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
469 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
470 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
471 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
472 if (qc->path->validated) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
473 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
474 if (next->tag != NGX_QUIC_PATH_BACKUP) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
475 /* can delete backup path, if any */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
476 bkp = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
477 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
478 if (bkp && ngx_quic_free_path(c, bkp) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
479 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
480 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
481 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
482 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
483 qc->path->tag = NGX_QUIC_PATH_BACKUP; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
484 ngx_quic_path_dbg(c, "is now backup", qc->path); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
485 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
486 } else { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
487 if (ngx_quic_free_path(c, qc->path) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
488 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
489 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
490 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
491 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
492 /* switch active path to migrated */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
493 qc->path = next; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
494 qc->path->tag = NGX_QUIC_PATH_ACTIVE; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
495 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
496 ngx_quic_set_connection_path(c, next); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
497 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
498 if (!next->validated && next->state != NGX_QUIC_PATH_VALIDATING) { |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
499 if (ngx_quic_validate_path(c, next) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
500 return NGX_ERROR; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
501 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
502 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
503 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
504 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
8997
fab36e4abf83
QUIC: got rid of hash symbol in backup and logging.
Vladimir Homutov <vl@nginx.com>
parents:
8985
diff
changeset
|
505 "quic migrated to path seq:%uL addr:%V", |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
506 qc->path->seqnum, &qc->path->addr_text); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
507 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
508 ngx_quic_path_dbg(c, "is now active", qc->path); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
509 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
510 return NGX_OK; |
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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
514 static ngx_int_t |
8944
b7284807b4fa
QUIC: refactored ngx_quic_validate_path().
Vladimir Homutov <vl@nginx.com>
parents:
8943
diff
changeset
|
515 ngx_quic_validate_path(ngx_connection_t *c, ngx_quic_path_t *path) |
8763
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 ngx_msec_t pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
518 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
519 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
520 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
521 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
522 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
523 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
8997
fab36e4abf83
QUIC: got rid of hash symbol in backup and logging.
Vladimir Homutov <vl@nginx.com>
parents:
8985
diff
changeset
|
524 "quic initiated validation of path seq:%uL", path->seqnum); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
525 |
9096
c6db94ec3841
QUIC: separated path validation retransmit backoff.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9029
diff
changeset
|
526 path->tries = 0; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
527 |
9189
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
528 if (RAND_bytes((u_char *) path->challenge, sizeof(path->challenge)) != 1) { |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
529 return NGX_ERROR; |
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 |
9154
f6b6f3dd7ca0
QUIC: ignore path validation socket error (ticket #2532).
Roman Arutyunyan <arut@nginx.com>
parents:
9147
diff
changeset
|
532 (void) ngx_quic_send_path_challenge(c, path); |
8763
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 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
9097
a9fef6ca45a8
QUIC: lower bound path validation PTO.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9096
diff
changeset
|
535 pto = ngx_max(ngx_quic_pto(c, ctx), 1000); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
536 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
537 path->expires = ngx_current_msec + pto; |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
538 path->state = NGX_QUIC_PATH_VALIDATING; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
539 |
9098
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
540 ngx_quic_set_path_timer(c); |
8763
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 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
543 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
544 |
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 static ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
547 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
|
548 { |
9189
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
549 size_t min; |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
550 ngx_uint_t n; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
551 ngx_quic_frame_t frame; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
552 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
553 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
8997
fab36e4abf83
QUIC: got rid of hash symbol in backup and logging.
Vladimir Homutov <vl@nginx.com>
parents:
8985
diff
changeset
|
554 "quic path seq:%uL send path_challenge tries:%ui", |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
555 path->seqnum, path->tries); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
556 |
8933
02a9ad88e2df
QUIC: added missing frame initialization.
Vladimir Homutov <vl@nginx.com>
parents:
8932
diff
changeset
|
557 ngx_memzero(&frame, sizeof(ngx_quic_frame_t)); |
02a9ad88e2df
QUIC: added missing frame initialization.
Vladimir Homutov <vl@nginx.com>
parents:
8932
diff
changeset
|
558 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
559 frame.level = ssl_encryption_application; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
560 frame.type = NGX_QUIC_FT_PATH_CHALLENGE; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
561 |
9189
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
562 for (n = 0; n < 2; n++) { |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
563 |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
564 ngx_memcpy(frame.u.path_challenge.data, path->challenge[n], 8); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
565 |
9189
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
566 /* |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
567 * RFC 9000, 8.2.1. Initiating Path Validation |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
568 * |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
569 * An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
570 * to at least the smallest allowed maximum datagram size of 1200 bytes, |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
571 * unless the anti-amplification limit for the path does not permit |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
572 * sending a datagram of this size. |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
573 */ |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
574 |
9189
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
575 min = (ngx_quic_path_limit(c, path, 1200) < 1200) ? 0 : 1200; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
576 |
9189
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
577 if (ngx_quic_frame_sendto(c, &frame, min, path) == NGX_ERROR) { |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
578 return NGX_ERROR; |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
579 } |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
580 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
581 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
582 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
583 } |
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 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
586 void |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
587 ngx_quic_discover_path_mtu(ngx_connection_t *c, ngx_quic_path_t *path) |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
588 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
589 ngx_quic_connection_t *qc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
590 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
591 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
592 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
593 if (path->max_mtu) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
594 if (path->max_mtu - path->mtu <= NGX_QUIC_PATH_MTU_PRECISION) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
595 path->state = NGX_QUIC_PATH_IDLE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
596 ngx_quic_set_path_timer(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
597 return; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
598 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
599 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
600 path->mtud = (path->mtu + path->max_mtu) / 2; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
601 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
602 } else { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
603 path->mtud = path->mtu * 2; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
604 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
605 if (path->mtud >= qc->ctp.max_udp_payload_size) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
606 path->mtud = qc->ctp.max_udp_payload_size; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
607 path->max_mtu = qc->ctp.max_udp_payload_size; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
608 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
609 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
610 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
611 path->state = NGX_QUIC_PATH_WAITING; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
612 path->expires = ngx_current_msec + NGX_QUIC_PATH_MTU_DELAY; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
613 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
614 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
615 "quic path seq:%uL schedule mtu:%uz", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
616 path->seqnum, path->mtud); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
617 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
618 ngx_quic_set_path_timer(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
619 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
620 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
621 |
9098
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
622 static void |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
623 ngx_quic_set_path_timer(ngx_connection_t *c) |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
624 { |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
625 ngx_msec_t now; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
626 ngx_queue_t *q; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
627 ngx_msec_int_t left, next; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
628 ngx_quic_path_t *path; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
629 ngx_quic_connection_t *qc; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
630 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
631 qc = ngx_quic_get_connection(c); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
632 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
633 now = ngx_current_msec; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
634 next = -1; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
635 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
636 for (q = ngx_queue_head(&qc->paths); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
637 q != ngx_queue_sentinel(&qc->paths); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
638 q = ngx_queue_next(q)) |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
639 { |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
640 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
641 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
642 if (path->state == NGX_QUIC_PATH_IDLE) { |
9098
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
643 continue; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
644 } |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
645 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
646 left = path->expires - now; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
647 left = ngx_max(left, 1); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
648 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
649 if (next == -1 || left < next) { |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
650 next = left; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
651 } |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
652 } |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
653 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
654 if (next != -1) { |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
655 ngx_add_timer(&qc->path_validation, next); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
656 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
657 } else if (qc->path_validation.timer_set) { |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
658 ngx_del_timer(&qc->path_validation); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
659 } |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
660 } |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
661 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
662 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
663 void |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
664 ngx_quic_path_handler(ngx_event_t *ev) |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
665 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
666 ngx_msec_t now; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
667 ngx_queue_t *q; |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
668 ngx_msec_int_t left; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
669 ngx_quic_path_t *path; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
670 ngx_connection_t *c; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
671 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
672 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
673 c = ev->data; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
674 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
675 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
676 now = ngx_current_msec; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
677 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
678 q = ngx_queue_head(&qc->paths); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
679 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
680 while (q != ngx_queue_sentinel(&qc->paths)) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
681 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
682 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
683 q = ngx_queue_next(q); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
684 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
685 if (path->state == NGX_QUIC_PATH_IDLE) { |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
686 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
687 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
688 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
689 left = path->expires - now; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
690 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
691 if (left > 0) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
692 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
693 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
694 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
695 switch (path->state) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
696 case NGX_QUIC_PATH_VALIDATING: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
697 if (ngx_quic_expire_path_validation(c, path) != NGX_OK) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
698 goto failed; |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
699 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
700 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
701 break; |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
702 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
703 case NGX_QUIC_PATH_WAITING: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
704 if (ngx_quic_expire_path_mtu_delay(c, path) != NGX_OK) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
705 goto failed; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
706 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
707 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
708 break; |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
709 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
710 case NGX_QUIC_PATH_MTUD: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
711 if (ngx_quic_expire_path_mtu_discovery(c, path) != NGX_OK) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
712 goto failed; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
713 } |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
714 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
715 break; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
716 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
717 default: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
718 break; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
719 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
720 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
721 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
722 ngx_quic_set_path_timer(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
723 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
724 return; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
725 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
726 failed: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
727 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
728 ngx_quic_close_connection(c, NGX_ERROR); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
729 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
730 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
731 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
732 static ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
733 ngx_quic_expire_path_validation(ngx_connection_t *c, ngx_quic_path_t *path) |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
734 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
735 ngx_msec_int_t pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
736 ngx_quic_path_t *bkp; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
737 ngx_quic_send_ctx_t *ctx; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
738 ngx_quic_connection_t *qc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
739 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
740 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
741 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
742 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
743 if (++path->tries < NGX_QUIC_PATH_RETRIES) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
744 pto = ngx_max(ngx_quic_pto(c, ctx), 1000) << path->tries; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
745 path->expires = ngx_current_msec + pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
746 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
747 (void) ngx_quic_send_path_challenge(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
748 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
749 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
750 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
751 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
752 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
753 "quic path seq:%uL validation failed", path->seqnum); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
754 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
755 /* found expired path */ |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
756 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
757 path->validated = 0; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
758 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
759 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
760 /* RFC 9000, 9.3.2. On-Path Address Spoofing |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
761 * |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
762 * To protect the connection from failing due to such a spurious |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
763 * migration, an endpoint MUST revert to using the last validated |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
764 * peer address when validation of a new peer address fails. |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
765 */ |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
766 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
767 if (qc->path == path) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
768 /* active path validation failed */ |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
769 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
770 bkp = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
771 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
772 if (bkp == NULL) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
773 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
774 qc->error_reason = "no viable path"; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
775 return NGX_ERROR; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
776 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
777 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
778 qc->path = bkp; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
779 qc->path->tag = NGX_QUIC_PATH_ACTIVE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
780 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
781 ngx_quic_set_connection_path(c, qc->path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
782 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
783 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
784 "quic path seq:%uL addr:%V is restored from backup", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
785 qc->path->seqnum, &qc->path->addr_text); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
786 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
787 ngx_quic_path_dbg(c, "is active", qc->path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
788 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
789 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
790 return ngx_quic_free_path(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
791 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
792 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
793 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
794 static ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
795 ngx_quic_expire_path_mtu_delay(ngx_connection_t *c, ngx_quic_path_t *path) |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
796 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
797 ngx_int_t rc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
798 ngx_uint_t i; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
799 ngx_msec_t pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
800 ngx_quic_send_ctx_t *ctx; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
801 ngx_quic_connection_t *qc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
802 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
803 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
804 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
805 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
806 path->tries = 0; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
807 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
808 for ( ;; ) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
809 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
810 for (i = 0; i < NGX_QUIC_PATH_RETRIES; i++) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
811 path->mtu_pnum[i] = NGX_QUIC_UNSET_PN; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
812 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
813 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
814 rc = ngx_quic_send_path_mtu_probe(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
815 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
816 if (rc == NGX_ERROR) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
817 return NGX_ERROR; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
818 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
819 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
820 if (rc == NGX_OK) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
821 pto = ngx_quic_pto(c, ctx); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
822 path->expires = ngx_current_msec + pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
823 path->state = NGX_QUIC_PATH_MTUD; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
824 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
825 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
826 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
827 /* rc == NGX_DECLINED */ |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
828 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
829 path->max_mtu = path->mtud; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
830 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
831 if (path->max_mtu - path->mtu <= NGX_QUIC_PATH_MTU_PRECISION) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
832 path->state = NGX_QUIC_PATH_IDLE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
833 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
834 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
835 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
836 path->mtud = (path->mtu + path->max_mtu) / 2; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
837 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
838 } |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
839 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
840 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
841 static ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
842 ngx_quic_expire_path_mtu_discovery(ngx_connection_t *c, ngx_quic_path_t *path) |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
843 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
844 ngx_int_t rc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
845 ngx_msec_int_t pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
846 ngx_quic_send_ctx_t *ctx; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
847 ngx_quic_connection_t *qc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
848 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
849 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
850 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
851 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
852 if (++path->tries < NGX_QUIC_PATH_RETRIES) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
853 rc = ngx_quic_send_path_mtu_probe(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
854 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
855 if (rc == NGX_ERROR) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
856 return NGX_ERROR; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
857 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
858 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
859 if (rc == NGX_OK) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
860 pto = ngx_quic_pto(c, ctx) << path->tries; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
861 path->expires = ngx_current_msec + pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
862 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
863 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
864 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
865 /* rc == NGX_DECLINED */ |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
866 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
867 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
868 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
869 "quic path seq:%uL expired mtu:%uz", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
870 path->seqnum, path->mtud); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
871 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
872 path->max_mtu = path->mtud; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
873 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
874 ngx_quic_discover_path_mtu(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
875 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
876 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
877 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
878 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
879 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
880 static ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
881 ngx_quic_send_path_mtu_probe(ngx_connection_t *c, ngx_quic_path_t *path) |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
882 { |
9190
3a67dd34b6cc
QUIC: fixed anti-amplification with explicit send.
Roman Arutyunyan <arut@nginx.com>
parents:
9189
diff
changeset
|
883 size_t mtu; |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
884 ngx_int_t rc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
885 ngx_uint_t log_error; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
886 ngx_quic_frame_t frame; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
887 ngx_quic_send_ctx_t *ctx; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
888 ngx_quic_connection_t *qc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
889 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
890 ngx_memzero(&frame, sizeof(ngx_quic_frame_t)); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
891 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
892 frame.level = ssl_encryption_application; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
893 frame.type = NGX_QUIC_FT_PING; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
894 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
895 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
896 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
897 path->mtu_pnum[path->tries] = ctx->pnum; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
898 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
899 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
900 "quic path seq:%uL send probe " |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
901 "mtu:%uz pnum:%uL tries:%ui", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
902 path->seqnum, path->mtud, ctx->pnum, path->tries); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
903 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
904 log_error = c->log_error; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
905 c->log_error = NGX_ERROR_IGNORE_EMSGSIZE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
906 |
9190
3a67dd34b6cc
QUIC: fixed anti-amplification with explicit send.
Roman Arutyunyan <arut@nginx.com>
parents:
9189
diff
changeset
|
907 mtu = path->mtu; |
3a67dd34b6cc
QUIC: fixed anti-amplification with explicit send.
Roman Arutyunyan <arut@nginx.com>
parents:
9189
diff
changeset
|
908 path->mtu = path->mtud; |
3a67dd34b6cc
QUIC: fixed anti-amplification with explicit send.
Roman Arutyunyan <arut@nginx.com>
parents:
9189
diff
changeset
|
909 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
910 rc = ngx_quic_frame_sendto(c, &frame, path->mtud, path); |
9190
3a67dd34b6cc
QUIC: fixed anti-amplification with explicit send.
Roman Arutyunyan <arut@nginx.com>
parents:
9189
diff
changeset
|
911 |
3a67dd34b6cc
QUIC: fixed anti-amplification with explicit send.
Roman Arutyunyan <arut@nginx.com>
parents:
9189
diff
changeset
|
912 path->mtu = mtu; |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
913 c->log_error = log_error; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
914 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
915 if (rc == NGX_ERROR) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
916 if (c->write->error) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
917 c->write->error = 0; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
918 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
919 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
920 "quic path seq:%uL rejected mtu:%uz", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
921 path->seqnum, path->mtud); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
922 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
923 return NGX_DECLINED; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
924 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
925 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
926 return NGX_ERROR; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
927 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
928 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
929 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
930 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
931 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
932 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
933 ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
934 ngx_quic_handle_path_mtu(ngx_connection_t *c, ngx_quic_path_t *path, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
935 uint64_t min, uint64_t max) |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
936 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
937 uint64_t pnum; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
938 ngx_uint_t i; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
939 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
940 if (path->state != NGX_QUIC_PATH_MTUD) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
941 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
942 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
943 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
944 for (i = 0; i < NGX_QUIC_PATH_RETRIES; i++) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
945 pnum = path->mtu_pnum[i]; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
946 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
947 if (pnum == NGX_QUIC_UNSET_PN) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
948 break; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
949 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
950 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
951 if (pnum < min || pnum > max) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
952 continue; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
953 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
954 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
955 path->mtu = path->mtud; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
956 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
957 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
958 "quic path seq:%uL ack mtu:%uz", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
959 path->seqnum, path->mtu); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
960 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
961 ngx_quic_discover_path_mtu(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
962 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
963 break; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
964 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
965 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
966 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
967 } |