Mercurial > hg > nginx
annotate src/event/quic/ngx_event_quic_migration.c @ 9194:a6f79f044de5
QUIC: path revalidation after expansion failure.
As per RFC 9000, Section 8.2.1:
When an endpoint is unable to expand the datagram size to 1200 bytes due
to the anti-amplification limit, the path MTU will not be validated.
To ensure that the path MTU is large enough, the endpoint MUST perform a
second path validation by sending a PATH_CHALLENGE frame in a datagram of
at least 1200 bytes.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Wed, 29 Nov 2023 10:58:21 +0400 |
parents | efcdaa66df2e |
children | ff452f283aa9 |
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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 *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 fp = ngx_quic_alloc_frame(c); |
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54 if (fp == NULL) { |
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55 return NGX_ERROR; |
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56 } |
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57 |
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58 fp->level = ssl_encryption_application; |
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59 fp->type = NGX_QUIC_FT_PATH_RESPONSE; |
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60 fp->u.path_response = *f; |
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61 |
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62 /* |
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63 * RFC 9000, 8.2.2. Path Validation Responses |
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64 * |
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65 * A PATH_RESPONSE frame MUST be sent on the network path where the |
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66 * PATH_CHALLENGE frame was received. |
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67 */ |
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68 |
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69 /* |
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70 * An endpoint MUST expand datagrams that contain a PATH_RESPONSE frame |
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71 * to at least the smallest allowed maximum datagram size of 1200 bytes. |
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72 * ... |
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73 * However, an endpoint MUST NOT expand the datagram containing the |
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74 * PATH_RESPONSE if the resulting data exceeds the anti-amplification limit. |
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75 */ |
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76 |
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77 min = (ngx_quic_path_limit(c, pkt->path, 1200) < 1200) ? 0 : 1200; |
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78 |
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79 if (ngx_quic_frame_sendto(c, fp, min, pkt->path) == NGX_ERROR) { |
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80 return NGX_ERROR; |
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81 } |
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82 |
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83 if (pkt->path == qc->path) { |
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84 /* |
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85 * RFC 9000, 9.3.3. Off-Path Packet Forwarding |
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86 * |
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87 * An endpoint that receives a PATH_CHALLENGE on an active path SHOULD |
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88 * send a non-probing packet in response. |
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89 */ |
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90 |
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91 fp = ngx_quic_alloc_frame(c); |
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92 if (fp == NULL) { |
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93 return NGX_ERROR; |
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94 } |
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95 |
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96 fp->level = ssl_encryption_application; |
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97 fp->type = NGX_QUIC_FT_PING; |
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98 |
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99 ngx_quic_queue_frame(qc, fp); |
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100 } |
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101 |
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102 return NGX_OK; |
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103 } |
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104 |
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105 |
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106 ngx_int_t |
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107 ngx_quic_handle_path_response_frame(ngx_connection_t *c, |
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108 ngx_quic_path_challenge_frame_t *f) |
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109 { |
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110 ngx_uint_t rst; |
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111 ngx_queue_t *q; |
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112 ngx_quic_path_t *path, *prev; |
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113 ngx_quic_connection_t *qc; |
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114 |
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115 qc = ngx_quic_get_connection(c); |
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|
116 |
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diff
changeset
|
117 /* |
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diff
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|
118 * RFC 9000, 8.2.3. Successful Path Validation |
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QUIC: updated specification references.
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diff
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|
119 * |
8763
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diff
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|
120 * A PATH_RESPONSE frame received on any network path validates the path |
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|
121 * on which the PATH_CHALLENGE was sent. |
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diff
changeset
|
122 */ |
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diff
changeset
|
123 |
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diff
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|
124 for (q = ngx_queue_head(&qc->paths); |
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|
125 q != ngx_queue_sentinel(&qc->paths); |
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diff
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|
126 q = ngx_queue_next(q)) |
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|
127 { |
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diff
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|
128 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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|
129 |
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|
130 if (path->state != NGX_QUIC_PATH_VALIDATING) { |
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diff
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|
131 continue; |
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diff
changeset
|
132 } |
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Vladimir Homutov <vl@nginx.com>
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diff
changeset
|
133 |
9189
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Roman Arutyunyan <arut@nginx.com>
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diff
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|
134 if (ngx_memcmp(path->challenge[0], f->data, sizeof(f->data)) == 0 |
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QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
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diff
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|
135 || ngx_memcmp(path->challenge[1], f->data, sizeof(f->data)) == 0) |
8763
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changeset
|
136 { |
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diff
changeset
|
137 goto valid; |
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diff
changeset
|
138 } |
4117aa7fa38e
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diff
changeset
|
139 } |
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|
140 |
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diff
changeset
|
141 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, |
9015
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QUIC: fixed indentation.
Sergey Kandaurov <pluknet@nginx.com>
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diff
changeset
|
142 "quic stale PATH_RESPONSE ignored"); |
8763
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|
143 |
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|
144 return NGX_OK; |
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diff
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|
145 |
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diff
changeset
|
146 valid: |
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diff
changeset
|
147 |
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changeset
|
148 /* |
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|
149 * RFC 9000, 9.4. Loss Detection and Congestion Control |
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|
150 * |
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|
151 * On confirming a peer's ownership of its new address, |
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|
152 * an endpoint MUST immediately reset the congestion controller |
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|
153 * and round-trip time estimator for the new path to initial values |
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|
154 * unless the only change in the peer's address is its port number. |
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|
155 */ |
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|
156 |
8943
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QUIC: added missing check for backup path existence.
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diff
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|
157 rst = 1; |
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diff
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|
158 |
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diff
changeset
|
159 prev = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP); |
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diff
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|
160 |
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diff
changeset
|
161 if (prev != NULL) { |
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|
162 |
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diff
changeset
|
163 if (ngx_cmp_sockaddr(prev->sockaddr, prev->socklen, |
118a34e32121
QUIC: added missing check for backup path existence.
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changeset
|
164 path->sockaddr, path->socklen, 0) |
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QUIC: added missing check for backup path existence.
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|
165 == NGX_OK) |
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diff
changeset
|
166 { |
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diff
changeset
|
167 /* address did not change */ |
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diff
changeset
|
168 rst = 0; |
9147
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diff
changeset
|
169 |
58afcd72446f
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diff
changeset
|
170 path->mtu = prev->mtu; |
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parents:
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diff
changeset
|
171 path->max_mtu = prev->max_mtu; |
9194
a6f79f044de5
QUIC: path revalidation after expansion failure.
Roman Arutyunyan <arut@nginx.com>
parents:
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diff
changeset
|
172 path->mtu_unvalidated = 0; |
8943
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diff
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|
173 } |
118a34e32121
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parents:
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diff
changeset
|
174 } |
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diff
changeset
|
175 |
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diff
changeset
|
176 if (rst) { |
8763
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diff
changeset
|
177 ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t)); |
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changeset
|
178 |
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diff
changeset
|
179 qc->congestion.window = ngx_min(10 * qc->tp.max_udp_payload_size, |
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changeset
|
180 ngx_max(2 * qc->tp.max_udp_payload_size, |
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QUIC: connection migration.
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diff
changeset
|
181 14720)); |
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diff
changeset
|
182 qc->congestion.ssthresh = (size_t) -1; |
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diff
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|
183 qc->congestion.recovery_start = ngx_current_msec; |
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parents:
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diff
changeset
|
184 } |
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parents:
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diff
changeset
|
185 |
9194
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Roman Arutyunyan <arut@nginx.com>
parents:
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diff
changeset
|
186 path->validated = 1; |
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QUIC: path revalidation after expansion failure.
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diff
changeset
|
187 |
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parents:
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diff
changeset
|
188 if (path->mtu_unvalidated) { |
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QUIC: path revalidation after expansion failure.
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diff
changeset
|
189 path->mtu_unvalidated = 0; |
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QUIC: path revalidation after expansion failure.
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diff
changeset
|
190 return ngx_quic_validate_path(c, path); |
a6f79f044de5
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parents:
9192
diff
changeset
|
191 } |
a6f79f044de5
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Roman Arutyunyan <arut@nginx.com>
parents:
9192
diff
changeset
|
192 |
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diff
changeset
|
193 /* |
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parents:
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diff
changeset
|
194 * RFC 9000, 9.3. Responding to Connection Migration |
4715f3e669f1
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changeset
|
195 * |
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|
196 * After verifying a new client address, the server SHOULD |
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|
197 * send new address validation tokens (Section 8) to the client. |
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diff
changeset
|
198 */ |
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changeset
|
199 |
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diff
changeset
|
200 if (ngx_quic_send_new_token(c, path) != NGX_OK) { |
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diff
changeset
|
201 return NGX_ERROR; |
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parents:
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diff
changeset
|
202 } |
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diff
changeset
|
203 |
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parents:
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diff
changeset
|
204 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
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QUIC: got rid of hash symbol in backup and logging.
Vladimir Homutov <vl@nginx.com>
parents:
8985
diff
changeset
|
205 "quic path seq:%uL addr:%V successfully validated", |
8971
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QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
206 path->seqnum, &path->addr_text); |
8763
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diff
changeset
|
207 |
8971
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parents:
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diff
changeset
|
208 ngx_quic_path_dbg(c, "is validated", path); |
1e2f4e9c8195
QUIC: reworked migration handling.
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parents:
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diff
changeset
|
209 |
9147
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QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
210 ngx_quic_discover_path_mtu(c, path); |
9098
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QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
211 |
8763
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parents:
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diff
changeset
|
212 return NGX_OK; |
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parents:
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diff
changeset
|
213 } |
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diff
changeset
|
214 |
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diff
changeset
|
215 |
8971
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QUIC: reworked migration handling.
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diff
changeset
|
216 ngx_quic_path_t * |
1e2f4e9c8195
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parents:
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diff
changeset
|
217 ngx_quic_new_path(ngx_connection_t *c, |
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QUIC: reworked migration handling.
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parents:
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diff
changeset
|
218 struct sockaddr *sockaddr, socklen_t socklen, ngx_quic_client_id_t *cid) |
8763
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changeset
|
219 { |
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diff
changeset
|
220 ngx_queue_t *q; |
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diff
changeset
|
221 ngx_quic_path_t *path; |
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diff
changeset
|
222 ngx_quic_connection_t *qc; |
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parents:
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changeset
|
223 |
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QUIC: connection migration.
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parents:
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diff
changeset
|
224 qc = ngx_quic_get_connection(c); |
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diff
changeset
|
225 |
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parents:
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diff
changeset
|
226 if (!ngx_queue_empty(&qc->free_paths)) { |
4117aa7fa38e
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diff
changeset
|
227 |
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parents:
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diff
changeset
|
228 q = ngx_queue_head(&qc->free_paths); |
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diff
changeset
|
229 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
4117aa7fa38e
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changeset
|
230 |
4117aa7fa38e
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diff
changeset
|
231 ngx_queue_remove(&path->queue); |
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QUIC: connection migration.
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diff
changeset
|
232 |
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QUIC: connection migration.
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diff
changeset
|
233 ngx_memzero(path, sizeof(ngx_quic_path_t)); |
4117aa7fa38e
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changeset
|
234 |
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parents:
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diff
changeset
|
235 } else { |
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parents:
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diff
changeset
|
236 |
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QUIC: connection migration.
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parents:
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diff
changeset
|
237 path = ngx_pcalloc(c->pool, sizeof(ngx_quic_path_t)); |
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Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
238 if (path == NULL) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
239 return NULL; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
240 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
241 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
242 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
243 ngx_queue_insert_tail(&qc->paths, &path->queue); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
244 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
245 path->cid = cid; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
246 cid->used = 1; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
247 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
248 path->seqnum = qc->path_seqnum++; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
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diff
changeset
|
249 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
250 path->sockaddr = &path->sa.sockaddr; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
251 path->socklen = socklen; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
252 ngx_memcpy(path->sockaddr, sockaddr, socklen); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
253 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
254 path->addr_text.data = path->text; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
255 path->addr_text.len = ngx_sock_ntop(sockaddr, socklen, path->text, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
256 NGX_SOCKADDR_STRLEN, 1); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
257 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
258 path->mtu = NGX_QUIC_MIN_INITIAL_SIZE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
259 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
260 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
|
261 "quic path seq:%uL created addr:%V", |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
262 path->seqnum, &path->addr_text); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
263 return path; |
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 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
266 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
267 static ngx_quic_path_t * |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
268 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
|
269 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
270 ngx_queue_t *q; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
271 ngx_quic_path_t *path; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
272 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
273 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
274 qc = ngx_quic_get_connection(c); |
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 for (q = ngx_queue_head(&qc->paths); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
277 q != ngx_queue_sentinel(&qc->paths); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
278 q = ngx_queue_next(q)) |
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 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
281 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
282 if (path->tag == tag) { |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
283 return path; |
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 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
286 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
287 return NULL; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
288 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
289 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
290 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
291 ngx_int_t |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
292 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
|
293 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
294 off_t len; |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
295 ngx_queue_t *q; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
296 ngx_quic_path_t *path, *probe; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
297 ngx_quic_socket_t *qsock; |
8972
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
298 ngx_quic_send_ctx_t *ctx; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
299 ngx_quic_client_id_t *cid; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
300 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
301 |
8939
ddd5e5c0f87d
QUIC: improved path validation.
Vladimir Homutov <vl@nginx.com>
parents:
8933
diff
changeset
|
302 qc = ngx_quic_get_connection(c); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
303 qsock = ngx_quic_get_socket(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
304 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
305 len = pkt->raw->last - pkt->raw->start; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
306 |
9017
c2f5d79cde64
QUIC: separate UDP framework for QUIC.
Roman Arutyunyan <arut@nginx.com>
parents:
9015
diff
changeset
|
307 if (c->udp->buffer == NULL) { |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
308 /* first ever packet in connection, path already exists */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
309 path = qc->path; |
8913
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
310 goto update; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
311 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
312 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
313 probe = NULL; |
8777
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
314 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
315 for (q = ngx_queue_head(&qc->paths); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
316 q != ngx_queue_sentinel(&qc->paths); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
317 q = ngx_queue_next(q)) |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
318 { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
319 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
320 |
9017
c2f5d79cde64
QUIC: separate UDP framework for QUIC.
Roman Arutyunyan <arut@nginx.com>
parents:
9015
diff
changeset
|
321 if (ngx_cmp_sockaddr(&qsock->sockaddr.sockaddr, qsock->socklen, |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
322 path->sockaddr, path->socklen, 1) |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
323 == NGX_OK) |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
324 { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
325 goto update; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
326 } |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
327 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
328 if (path->tag == NGX_QUIC_PATH_PROBE) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
329 probe = path; |
8777
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
parents:
8763
diff
changeset
|
330 } |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
331 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
332 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
333 /* packet from new path, drop current probe, if any */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
334 |
8972
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
335 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
|
336 |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
337 /* |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
338 * 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
|
339 * exhaustion by excessive probing packets from unknown paths |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
340 */ |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
341 if (pkt->pn != ctx->largest_pn) { |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
342 return NGX_DONE; |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
343 } |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
344 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
345 if (probe && ngx_quic_free_path(c, probe) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
346 return NGX_ERROR; |
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 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
349 /* new path requires new client id */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
350 cid = ngx_quic_next_client_id(c); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
351 if (cid == NULL) { |
9029
28fc35b71d75
QUIC: "info" logging level on insufficient client connection ids.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9017
diff
changeset
|
352 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
353 "quic no available client ids for new path"); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
354 /* stop processing of this datagram */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
355 return NGX_DONE; |
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 |
9017
c2f5d79cde64
QUIC: separate UDP framework for QUIC.
Roman Arutyunyan <arut@nginx.com>
parents:
9015
diff
changeset
|
358 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
|
359 if (path == NULL) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
360 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
361 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
362 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
363 path->tag = NGX_QUIC_PATH_PROBE; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
364 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
365 /* |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
366 * client arrived using new path and previously seen DCID, |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
367 * this indicates NAT rebinding (or bad client) |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
368 */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
369 if (qsock->used) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
370 pkt->rebound = 1; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
371 } |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
372 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
373 update: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
374 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
375 qsock->used = 1; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
376 pkt->path = path; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
377 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
378 /* TODO: this may be too late in some cases; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
379 * for example, if error happens during decrypt(), we cannot |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
380 * send CC, if error happens in 1st packet, due to amplification |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
381 * limit, because path->received = 0 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
382 * |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
383 * should we account garbage as received or only decrypting packets? |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
384 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
385 path->received += len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
386 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
387 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
|
388 "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
|
389 len, (int64_t) qsock->sid.seqnum, path->seqnum); |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
390 ngx_quic_path_dbg(c, "status", path); |
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 return NGX_OK; |
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 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
395 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
396 ngx_int_t |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
397 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
|
398 { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
399 ngx_quic_connection_t *qc; |
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 qc = ngx_quic_get_connection(c); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
402 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
403 ngx_queue_remove(&path->queue); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
404 ngx_queue_insert_head(&qc->free_paths, &path->queue); |
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 * 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
|
408 * this also requests new CIDs from client |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
409 */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
410 if (path->cid) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
411 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
|
412 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
413 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
414 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
415 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
416 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
|
417 "quic path seq:%uL addr:%V retired", |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
418 path->seqnum, &path->addr_text); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
419 |
8737
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
420 return NGX_OK; |
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
421 } |
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
422 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
423 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
424 static void |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
425 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
|
426 { |
9015
a2fbae359828
QUIC: fixed indentation.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8997
diff
changeset
|
427 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
428 c->socklen = path->socklen; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
429 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
430 if (c->addr_text.data) { |
9099
9462c514a653
QUIC: fixed addr_text after migration (ticket #2488).
Roman Arutyunyan <arut@nginx.com>
parents:
9098
diff
changeset
|
431 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
|
432 c->addr_text.data, |
9462c514a653
QUIC: fixed addr_text after migration (ticket #2488).
Roman Arutyunyan <arut@nginx.com>
parents:
9098
diff
changeset
|
433 c->listening->addr_text_max_len, 0); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
434 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
435 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
436 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
|
437 "quic send path set to seq:%uL addr:%V", |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
438 path->seqnum, &path->addr_text); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
439 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
440 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
441 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
442 ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
443 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
|
444 { |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
445 ngx_quic_path_t *next, *bkp; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
446 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
447 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
448 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
449 /* got non-probing packet via non-active path */ |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
450 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
451 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
452 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
453 ctx = ngx_quic_get_send_ctx(qc, pkt->level); |
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 /* |
8797
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
456 * RFC 9000, 9.3. Responding to Connection Migration |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
457 * |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
458 * 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
|
459 * response to the highest-numbered non-probing packet. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
460 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
461 if (pkt->pn != ctx->largest_pn) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
462 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
463 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
464 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
465 next = pkt->path; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
466 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
467 /* |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
468 * RFC 9000, 9.3.3: |
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 * In response to an apparent migration, endpoints MUST validate the |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
471 * previously active path using a PATH_CHALLENGE frame. |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
472 */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
473 if (pkt->rebound) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
474 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
475 /* NAT rebinding: client uses new path with old SID */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
476 if (ngx_quic_validate_path(c, qc->path) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
477 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
478 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
479 } |
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 if (qc->path->validated) { |
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 if (next->tag != NGX_QUIC_PATH_BACKUP) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
484 /* can delete backup path, if any */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
485 bkp = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
486 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
487 if (bkp && ngx_quic_free_path(c, bkp) != 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 qc->path->tag = NGX_QUIC_PATH_BACKUP; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
493 ngx_quic_path_dbg(c, "is now backup", qc->path); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
494 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
495 } else { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
496 if (ngx_quic_free_path(c, qc->path) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
497 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
498 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
499 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
500 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
501 /* switch active path to migrated */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
502 qc->path = next; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
503 qc->path->tag = NGX_QUIC_PATH_ACTIVE; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
504 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
505 ngx_quic_set_connection_path(c, next); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
506 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
507 if (!next->validated && next->state != NGX_QUIC_PATH_VALIDATING) { |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
508 if (ngx_quic_validate_path(c, next) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
509 return NGX_ERROR; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
510 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
511 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
512 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
513 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
|
514 "quic migrated to path seq:%uL addr:%V", |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
515 qc->path->seqnum, &qc->path->addr_text); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
516 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
517 ngx_quic_path_dbg(c, "is now active", qc->path); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
518 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
519 return NGX_OK; |
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 |
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 static ngx_int_t |
8944
b7284807b4fa
QUIC: refactored ngx_quic_validate_path().
Vladimir Homutov <vl@nginx.com>
parents:
8943
diff
changeset
|
524 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
|
525 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
526 ngx_msec_t pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
527 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
528 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
529 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
530 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
531 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
532 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
|
533 "quic initiated validation of path seq:%uL", path->seqnum); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
534 |
9096
c6db94ec3841
QUIC: separated path validation retransmit backoff.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9029
diff
changeset
|
535 path->tries = 0; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
536 |
9189
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
537 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
|
538 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
539 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
540 |
9154
f6b6f3dd7ca0
QUIC: ignore path validation socket error (ticket #2532).
Roman Arutyunyan <arut@nginx.com>
parents:
9147
diff
changeset
|
541 (void) ngx_quic_send_path_challenge(c, path); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
542 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
543 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
9097
a9fef6ca45a8
QUIC: lower bound path validation PTO.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9096
diff
changeset
|
544 pto = ngx_max(ngx_quic_pto(c, ctx), 1000); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
545 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
546 path->expires = ngx_current_msec + pto; |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
547 path->state = NGX_QUIC_PATH_VALIDATING; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
548 |
9098
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
549 ngx_quic_set_path_timer(c); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
550 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
551 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
552 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
553 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
554 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
555 static ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
556 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
|
557 { |
9192
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
558 size_t min; |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
559 ngx_uint_t n; |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
560 ngx_quic_frame_t *frame; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
561 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
562 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
|
563 "quic path seq:%uL send path_challenge tries:%ui", |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
564 path->seqnum, path->tries); |
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 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
|
567 |
9192
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
568 frame = ngx_quic_alloc_frame(c); |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
569 if (frame == NULL) { |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
570 return NGX_ERROR; |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
571 } |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
572 |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
573 frame->level = ssl_encryption_application; |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
574 frame->type = NGX_QUIC_FT_PATH_CHALLENGE; |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
575 |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
576 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
|
577 |
9189
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
578 /* |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
579 * 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
|
580 * |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
581 * 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
|
582 * 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
|
583 * 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
|
584 * 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
|
585 */ |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
586 |
9194
a6f79f044de5
QUIC: path revalidation after expansion failure.
Roman Arutyunyan <arut@nginx.com>
parents:
9192
diff
changeset
|
587 if (path->mtu_unvalidated |
a6f79f044de5
QUIC: path revalidation after expansion failure.
Roman Arutyunyan <arut@nginx.com>
parents:
9192
diff
changeset
|
588 || ngx_quic_path_limit(c, path, 1200) < 1200) |
a6f79f044de5
QUIC: path revalidation after expansion failure.
Roman Arutyunyan <arut@nginx.com>
parents:
9192
diff
changeset
|
589 { |
a6f79f044de5
QUIC: path revalidation after expansion failure.
Roman Arutyunyan <arut@nginx.com>
parents:
9192
diff
changeset
|
590 min = 0; |
a6f79f044de5
QUIC: path revalidation after expansion failure.
Roman Arutyunyan <arut@nginx.com>
parents:
9192
diff
changeset
|
591 path->mtu_unvalidated = 1; |
a6f79f044de5
QUIC: path revalidation after expansion failure.
Roman Arutyunyan <arut@nginx.com>
parents:
9192
diff
changeset
|
592 |
a6f79f044de5
QUIC: path revalidation after expansion failure.
Roman Arutyunyan <arut@nginx.com>
parents:
9192
diff
changeset
|
593 } else { |
a6f79f044de5
QUIC: path revalidation after expansion failure.
Roman Arutyunyan <arut@nginx.com>
parents:
9192
diff
changeset
|
594 min = 1200; |
a6f79f044de5
QUIC: path revalidation after expansion failure.
Roman Arutyunyan <arut@nginx.com>
parents:
9192
diff
changeset
|
595 } |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
596 |
9192
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
597 if (ngx_quic_frame_sendto(c, frame, min, path) == NGX_ERROR) { |
9189
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
598 return NGX_ERROR; |
fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
Roman Arutyunyan <arut@nginx.com>
parents:
9154
diff
changeset
|
599 } |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
600 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
601 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
602 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
603 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
604 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
605 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
606 void |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
607 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
|
608 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
609 ngx_quic_connection_t *qc; |
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 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
612 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
613 if (path->max_mtu) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
614 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
|
615 path->state = NGX_QUIC_PATH_IDLE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
616 ngx_quic_set_path_timer(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
617 return; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
618 } |
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 path->mtud = (path->mtu + path->max_mtu) / 2; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
621 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
622 } else { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
623 path->mtud = path->mtu * 2; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
624 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
625 if (path->mtud >= qc->ctp.max_udp_payload_size) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
626 path->mtud = qc->ctp.max_udp_payload_size; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
627 path->max_mtu = qc->ctp.max_udp_payload_size; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
628 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
629 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
630 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
631 path->state = NGX_QUIC_PATH_WAITING; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
632 path->expires = ngx_current_msec + NGX_QUIC_PATH_MTU_DELAY; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
633 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
634 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
635 "quic path seq:%uL schedule mtu:%uz", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
636 path->seqnum, path->mtud); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
637 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
638 ngx_quic_set_path_timer(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
639 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
640 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
641 |
9098
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
642 static void |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
643 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
|
644 { |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
645 ngx_msec_t now; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
646 ngx_queue_t *q; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
647 ngx_msec_int_t left, next; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
648 ngx_quic_path_t *path; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
649 ngx_quic_connection_t *qc; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
650 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
651 qc = ngx_quic_get_connection(c); |
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 now = ngx_current_msec; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
654 next = -1; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
655 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
656 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
|
657 q != ngx_queue_sentinel(&qc->paths); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
658 q = ngx_queue_next(q)) |
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 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
|
661 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
662 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
|
663 continue; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
664 } |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
665 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
666 left = path->expires - now; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
667 left = ngx_max(left, 1); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
668 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
669 if (next == -1 || left < next) { |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
670 next = left; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
671 } |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
672 } |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
673 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
674 if (next != -1) { |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
675 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
|
676 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
677 } 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
|
678 ngx_del_timer(&qc->path_validation); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
679 } |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
680 } |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
681 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
682 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
683 void |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
684 ngx_quic_path_handler(ngx_event_t *ev) |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
685 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
686 ngx_msec_t now; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
687 ngx_queue_t *q; |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
688 ngx_msec_int_t left; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
689 ngx_quic_path_t *path; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
690 ngx_connection_t *c; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
691 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
692 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
693 c = ev->data; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
694 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
695 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
696 now = ngx_current_msec; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
697 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
698 q = ngx_queue_head(&qc->paths); |
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 while (q != ngx_queue_sentinel(&qc->paths)) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
701 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
702 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
|
703 q = ngx_queue_next(q); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
704 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
705 if (path->state == NGX_QUIC_PATH_IDLE) { |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
706 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
707 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
708 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
709 left = path->expires - now; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
710 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
711 if (left > 0) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
712 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
713 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
714 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
715 switch (path->state) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
716 case NGX_QUIC_PATH_VALIDATING: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
717 if (ngx_quic_expire_path_validation(c, path) != NGX_OK) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
718 goto failed; |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
719 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
720 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
721 break; |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
722 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
723 case NGX_QUIC_PATH_WAITING: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
724 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
|
725 goto failed; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
726 } |
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 break; |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
729 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
730 case NGX_QUIC_PATH_MTUD: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
731 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
|
732 goto failed; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
733 } |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
734 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
735 break; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
736 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
737 default: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
738 break; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
739 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
740 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
741 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
742 ngx_quic_set_path_timer(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
743 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
744 return; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
745 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
746 failed: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
747 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
748 ngx_quic_close_connection(c, NGX_ERROR); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
749 } |
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 static ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
753 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
|
754 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
755 ngx_msec_int_t pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
756 ngx_quic_path_t *bkp; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
757 ngx_quic_send_ctx_t *ctx; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
758 ngx_quic_connection_t *qc; |
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 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
761 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
762 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
763 if (++path->tries < NGX_QUIC_PATH_RETRIES) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
764 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
|
765 path->expires = ngx_current_msec + pto; |
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 (void) ngx_quic_send_path_challenge(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
768 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
769 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
770 } |
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 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
773 "quic path seq:%uL validation failed", path->seqnum); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
774 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
775 /* found expired path */ |
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 path->validated = 0; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
778 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
779 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
780 /* RFC 9000, 9.3.2. On-Path Address Spoofing |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
781 * |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
782 * 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
|
783 * migration, an endpoint MUST revert to using the last validated |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
784 * peer address when validation of a new peer address fails. |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
785 */ |
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 if (qc->path == path) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
788 /* active path validation failed */ |
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 bkp = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP); |
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 if (bkp == NULL) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
793 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
794 qc->error_reason = "no viable path"; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
795 return NGX_ERROR; |
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 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
798 qc->path = bkp; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
799 qc->path->tag = NGX_QUIC_PATH_ACTIVE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
800 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
801 ngx_quic_set_connection_path(c, qc->path); |
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 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
804 "quic path seq:%uL addr:%V is restored from backup", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
805 qc->path->seqnum, &qc->path->addr_text); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
806 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
807 ngx_quic_path_dbg(c, "is active", qc->path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
808 } |
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 return ngx_quic_free_path(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
811 } |
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 static ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
815 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
|
816 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
817 ngx_int_t rc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
818 ngx_uint_t i; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
819 ngx_msec_t pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
820 ngx_quic_send_ctx_t *ctx; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
821 ngx_quic_connection_t *qc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
822 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
823 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
824 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
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 path->tries = 0; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
827 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
828 for ( ;; ) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
829 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
830 for (i = 0; i < NGX_QUIC_PATH_RETRIES; i++) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
831 path->mtu_pnum[i] = NGX_QUIC_UNSET_PN; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
832 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
833 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
834 rc = ngx_quic_send_path_mtu_probe(c, path); |
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 if (rc == NGX_ERROR) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
837 return NGX_ERROR; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
838 } |
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 if (rc == NGX_OK) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
841 pto = ngx_quic_pto(c, ctx); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
842 path->expires = ngx_current_msec + pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
843 path->state = NGX_QUIC_PATH_MTUD; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
844 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
845 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
846 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
847 /* rc == NGX_DECLINED */ |
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 path->max_mtu = path->mtud; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
850 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
851 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
|
852 path->state = NGX_QUIC_PATH_IDLE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
853 return NGX_OK; |
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 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
856 path->mtud = (path->mtu + path->max_mtu) / 2; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
857 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
858 } |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
859 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
860 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
861 static ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
862 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
|
863 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
864 ngx_int_t rc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
865 ngx_msec_int_t pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
866 ngx_quic_send_ctx_t *ctx; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
867 ngx_quic_connection_t *qc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
868 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
869 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
870 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
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 if (++path->tries < NGX_QUIC_PATH_RETRIES) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
873 rc = ngx_quic_send_path_mtu_probe(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
874 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
875 if (rc == NGX_ERROR) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
876 return NGX_ERROR; |
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 if (rc == NGX_OK) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
880 pto = ngx_quic_pto(c, ctx) << path->tries; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
881 path->expires = ngx_current_msec + pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
882 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
883 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
884 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
885 /* rc == NGX_DECLINED */ |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
886 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
887 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
888 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
889 "quic path seq:%uL expired mtu:%uz", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
890 path->seqnum, path->mtud); |
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 path->max_mtu = path->mtud; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
893 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
894 ngx_quic_discover_path_mtu(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
895 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
896 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
897 } |
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 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
900 static ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
901 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
|
902 { |
9190
3a67dd34b6cc
QUIC: fixed anti-amplification with explicit send.
Roman Arutyunyan <arut@nginx.com>
parents:
9189
diff
changeset
|
903 size_t mtu; |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
904 ngx_int_t rc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
905 ngx_uint_t log_error; |
9192
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
906 ngx_quic_frame_t *frame; |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
907 ngx_quic_send_ctx_t *ctx; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
908 ngx_quic_connection_t *qc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
909 |
9192
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
910 frame = ngx_quic_alloc_frame(c); |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
911 if (frame == NULL) { |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
912 return NGX_ERROR; |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
913 } |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
914 |
9192
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
915 frame->level = ssl_encryption_application; |
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
916 frame->type = NGX_QUIC_FT_PING; |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
917 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
918 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
919 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
920 path->mtu_pnum[path->tries] = ctx->pnum; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
921 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
922 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
923 "quic path seq:%uL send probe " |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
924 "mtu:%uz pnum:%uL tries:%ui", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
925 path->seqnum, path->mtud, ctx->pnum, path->tries); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
926 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
927 log_error = c->log_error; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
928 c->log_error = NGX_ERROR_IGNORE_EMSGSIZE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
929 |
9190
3a67dd34b6cc
QUIC: fixed anti-amplification with explicit send.
Roman Arutyunyan <arut@nginx.com>
parents:
9189
diff
changeset
|
930 mtu = path->mtu; |
3a67dd34b6cc
QUIC: fixed anti-amplification with explicit send.
Roman Arutyunyan <arut@nginx.com>
parents:
9189
diff
changeset
|
931 path->mtu = path->mtud; |
3a67dd34b6cc
QUIC: fixed anti-amplification with explicit send.
Roman Arutyunyan <arut@nginx.com>
parents:
9189
diff
changeset
|
932 |
9192
efcdaa66df2e
QUIC: congestion control in ngx_quic_frame_sendto().
Roman Arutyunyan <arut@nginx.com>
parents:
9191
diff
changeset
|
933 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
|
934 |
3a67dd34b6cc
QUIC: fixed anti-amplification with explicit send.
Roman Arutyunyan <arut@nginx.com>
parents:
9189
diff
changeset
|
935 path->mtu = mtu; |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
936 c->log_error = log_error; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
937 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
938 if (rc == NGX_ERROR) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
939 if (c->write->error) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
940 c->write->error = 0; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
941 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
942 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
943 "quic path seq:%uL rejected mtu:%uz", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
944 path->seqnum, path->mtud); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
945 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
946 return NGX_DECLINED; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
947 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
948 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
949 return NGX_ERROR; |
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 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
952 return NGX_OK; |
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 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
956 ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
957 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
|
958 uint64_t min, uint64_t max) |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
959 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
960 uint64_t pnum; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
961 ngx_uint_t i; |
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 if (path->state != NGX_QUIC_PATH_MTUD) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
964 return NGX_OK; |
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 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
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967 for (i = 0; i < NGX_QUIC_PATH_RETRIES; i++) { |
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968 pnum = path->mtu_pnum[i]; |
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969 |
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970 if (pnum == NGX_QUIC_UNSET_PN) { |
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971 break; |
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972 } |
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973 |
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974 if (pnum < min || pnum > max) { |
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975 continue; |
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976 } |
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977 |
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978 path->mtu = path->mtud; |
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979 |
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980 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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981 "quic path seq:%uL ack mtu:%uz", |
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982 path->seqnum, path->mtu); |
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983 |
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984 ngx_quic_discover_path_mtu(c, path); |
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985 |
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986 break; |
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987 } |
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988 |
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989 return NGX_OK; |
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990 } |