Mercurial > hg > nginx
annotate src/event/quic/ngx_event_quic_migration.c @ 9147:58afcd72446f
QUIC: path MTU discovery.
MTU selection starts by doubling the initial MTU until the first failure.
Then binary search is used to find the path MTU.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Mon, 14 Aug 2023 09:21:27 +0400 |
parents | f3412ec3b6d1 |
children | f6b6f3dd7ca0 |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Nginx, Inc. |
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4 */ |
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5 |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_event.h> |
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10 #include <ngx_event_quic_connection.h> |
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11 |
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12 |
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13 #define NGX_QUIC_PATH_MTU_DELAY 100 |
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14 #define NGX_QUIC_PATH_MTU_PRECISION 16 |
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15 |
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16 |
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17 static void ngx_quic_set_connection_path(ngx_connection_t *c, |
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18 ngx_quic_path_t *path); |
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19 static ngx_int_t ngx_quic_validate_path(ngx_connection_t *c, |
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20 ngx_quic_path_t *path); |
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21 static ngx_int_t ngx_quic_send_path_challenge(ngx_connection_t *c, |
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22 ngx_quic_path_t *path); |
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23 static void ngx_quic_set_path_timer(ngx_connection_t *c); |
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24 static ngx_int_t ngx_quic_expire_path_validation(ngx_connection_t *c, |
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25 ngx_quic_path_t *path); |
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26 static ngx_int_t ngx_quic_expire_path_mtu_delay(ngx_connection_t *c, |
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27 ngx_quic_path_t *path); |
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28 static ngx_int_t ngx_quic_expire_path_mtu_discovery(ngx_connection_t *c, |
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29 ngx_quic_path_t *path); |
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30 static ngx_quic_path_t *ngx_quic_get_path(ngx_connection_t *c, ngx_uint_t tag); |
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31 static ngx_int_t ngx_quic_send_path_mtu_probe(ngx_connection_t *c, |
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32 ngx_quic_path_t *path); |
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33 |
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34 |
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35 ngx_int_t |
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36 ngx_quic_handle_path_challenge_frame(ngx_connection_t *c, |
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37 ngx_quic_header_t *pkt, ngx_quic_path_challenge_frame_t *f) |
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38 { |
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39 ngx_quic_frame_t frame, *fp; |
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40 ngx_quic_connection_t *qc; |
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41 |
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42 qc = ngx_quic_get_connection(c); |
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43 |
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44 ngx_memzero(&frame, sizeof(ngx_quic_frame_t)); |
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45 |
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46 frame.level = ssl_encryption_application; |
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47 frame.type = NGX_QUIC_FT_PATH_RESPONSE; |
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48 frame.u.path_response = *f; |
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49 |
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50 /* |
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51 * RFC 9000, 8.2.2. Path Validation Responses |
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52 * |
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53 * A PATH_RESPONSE frame MUST be sent on the network path where the |
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54 * PATH_CHALLENGE frame was received. |
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55 */ |
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56 |
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57 /* |
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58 * An endpoint MUST expand datagrams that contain a PATH_RESPONSE frame |
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59 * to at least the smallest allowed maximum datagram size of 1200 bytes. |
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60 */ |
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61 if (ngx_quic_frame_sendto(c, &frame, 1200, pkt->path) == NGX_ERROR) { |
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62 return NGX_ERROR; |
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63 } |
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64 |
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65 if (pkt->path == qc->path) { |
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66 /* |
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67 * RFC 9000, 9.3.3. Off-Path Packet Forwarding |
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68 * |
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69 * An endpoint that receives a PATH_CHALLENGE on an active path SHOULD |
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70 * send a non-probing packet in response. |
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71 */ |
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72 |
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73 fp = ngx_quic_alloc_frame(c); |
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74 if (fp == NULL) { |
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75 return NGX_ERROR; |
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76 } |
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77 |
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78 fp->level = ssl_encryption_application; |
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79 fp->type = NGX_QUIC_FT_PING; |
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80 |
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81 ngx_quic_queue_frame(qc, fp); |
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82 } |
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83 |
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84 return NGX_OK; |
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85 } |
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86 |
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87 |
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88 ngx_int_t |
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89 ngx_quic_handle_path_response_frame(ngx_connection_t *c, |
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90 ngx_quic_path_challenge_frame_t *f) |
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91 { |
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92 ngx_uint_t rst; |
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93 ngx_queue_t *q; |
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94 ngx_quic_path_t *path, *prev; |
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95 ngx_quic_connection_t *qc; |
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96 |
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97 qc = ngx_quic_get_connection(c); |
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98 |
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99 /* |
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100 * RFC 9000, 8.2.3. Successful Path Validation |
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101 * |
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102 * A PATH_RESPONSE frame received on any network path validates the path |
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103 * on which the PATH_CHALLENGE was sent. |
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104 */ |
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105 |
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106 for (q = ngx_queue_head(&qc->paths); |
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107 q != ngx_queue_sentinel(&qc->paths); |
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108 q = ngx_queue_next(q)) |
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109 { |
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110 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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111 |
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112 if (path->state != NGX_QUIC_PATH_VALIDATING) { |
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113 continue; |
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114 } |
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115 |
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116 if (ngx_memcmp(path->challenge1, f->data, sizeof(f->data)) == 0 |
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117 || ngx_memcmp(path->challenge2, f->data, sizeof(f->data)) == 0) |
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118 { |
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119 goto valid; |
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|
120 } |
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|
121 } |
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|
122 |
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|
123 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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QUIC: fixed indentation.
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|
124 "quic stale PATH_RESPONSE ignored"); |
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|
125 |
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|
126 return NGX_OK; |
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|
127 |
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|
128 valid: |
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|
129 |
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|
130 /* |
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|
131 * RFC 9000, 9.4. Loss Detection and Congestion Control |
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132 * |
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133 * On confirming a peer's ownership of its new address, |
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134 * an endpoint MUST immediately reset the congestion controller |
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|
135 * and round-trip time estimator for the new path to initial values |
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|
136 * unless the only change in the peer's address is its port number. |
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|
137 */ |
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138 |
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|
139 rst = 1; |
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140 |
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|
141 prev = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP); |
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142 |
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143 if (prev != NULL) { |
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|
144 |
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|
145 if (ngx_cmp_sockaddr(prev->sockaddr, prev->socklen, |
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|
146 path->sockaddr, path->socklen, 0) |
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147 == NGX_OK) |
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|
148 { |
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|
149 /* address did not change */ |
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|
150 rst = 0; |
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|
151 |
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|
152 path->mtu = prev->mtu; |
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|
153 path->max_mtu = prev->max_mtu; |
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|
154 } |
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|
155 } |
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|
156 |
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|
157 if (rst) { |
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|
158 ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t)); |
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159 |
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|
160 qc->congestion.window = ngx_min(10 * qc->tp.max_udp_payload_size, |
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161 ngx_max(2 * qc->tp.max_udp_payload_size, |
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|
162 14720)); |
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|
163 qc->congestion.ssthresh = (size_t) -1; |
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|
164 qc->congestion.recovery_start = ngx_current_msec; |
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|
165 } |
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|
166 |
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|
167 /* |
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|
168 * RFC 9000, 9.3. Responding to Connection Migration |
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|
169 * |
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170 * After verifying a new client address, the server SHOULD |
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171 * send new address validation tokens (Section 8) to the client. |
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|
172 */ |
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|
173 |
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|
174 if (ngx_quic_send_new_token(c, path) != NGX_OK) { |
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|
175 return NGX_ERROR; |
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|
176 } |
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|
177 |
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|
178 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
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|
179 "quic path seq:%uL addr:%V successfully validated", |
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|
180 path->seqnum, &path->addr_text); |
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|
181 |
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|
182 ngx_quic_path_dbg(c, "is validated", path); |
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|
183 |
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|
184 path->validated = 1; |
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|
185 |
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|
186 ngx_quic_discover_path_mtu(c, path); |
9098
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diff
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|
187 |
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|
188 return NGX_OK; |
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changeset
|
189 } |
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|
190 |
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|
191 |
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|
192 ngx_quic_path_t * |
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|
193 ngx_quic_new_path(ngx_connection_t *c, |
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|
194 struct sockaddr *sockaddr, socklen_t socklen, ngx_quic_client_id_t *cid) |
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|
195 { |
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|
196 ngx_queue_t *q; |
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|
197 ngx_quic_path_t *path; |
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|
198 ngx_quic_connection_t *qc; |
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|
199 |
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|
200 qc = ngx_quic_get_connection(c); |
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|
201 |
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|
202 if (!ngx_queue_empty(&qc->free_paths)) { |
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|
203 |
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|
204 q = ngx_queue_head(&qc->free_paths); |
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|
205 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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|
206 |
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|
207 ngx_queue_remove(&path->queue); |
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|
208 |
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|
209 ngx_memzero(path, sizeof(ngx_quic_path_t)); |
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210 |
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|
211 } else { |
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|
212 |
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213 path = ngx_pcalloc(c->pool, sizeof(ngx_quic_path_t)); |
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214 if (path == NULL) { |
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|
215 return NULL; |
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|
216 } |
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|
217 } |
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218 |
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|
219 ngx_queue_insert_tail(&qc->paths, &path->queue); |
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220 |
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|
221 path->cid = cid; |
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|
222 cid->used = 1; |
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|
223 |
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224 path->seqnum = qc->path_seqnum++; |
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|
225 |
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changeset
|
226 path->sockaddr = &path->sa.sockaddr; |
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227 path->socklen = socklen; |
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changeset
|
228 ngx_memcpy(path->sockaddr, sockaddr, socklen); |
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229 |
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|
230 path->addr_text.data = path->text; |
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|
231 path->addr_text.len = ngx_sock_ntop(sockaddr, socklen, path->text, |
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|
232 NGX_SOCKADDR_STRLEN, 1); |
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|
233 |
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|
234 path->mtu = NGX_QUIC_MIN_INITIAL_SIZE; |
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|
235 |
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|
236 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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|
237 "quic path seq:%uL created addr:%V", |
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|
238 path->seqnum, &path->addr_text); |
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|
239 return path; |
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|
240 } |
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changeset
|
241 |
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|
242 |
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changeset
|
243 static ngx_quic_path_t * |
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|
244 ngx_quic_get_path(ngx_connection_t *c, ngx_uint_t tag) |
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|
245 { |
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|
246 ngx_queue_t *q; |
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|
247 ngx_quic_path_t *path; |
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|
248 ngx_quic_connection_t *qc; |
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|
249 |
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|
250 qc = ngx_quic_get_connection(c); |
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|
251 |
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|
252 for (q = ngx_queue_head(&qc->paths); |
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|
253 q != ngx_queue_sentinel(&qc->paths); |
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|
254 q = ngx_queue_next(q)) |
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|
255 { |
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diff
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|
256 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
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|
257 |
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changeset
|
258 if (path->tag == tag) { |
8763
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|
259 return path; |
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diff
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|
260 } |
4117aa7fa38e
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diff
changeset
|
261 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
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diff
changeset
|
262 |
4117aa7fa38e
QUIC: connection migration.
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diff
changeset
|
263 return NULL; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
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diff
changeset
|
264 } |
4117aa7fa38e
QUIC: connection migration.
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diff
changeset
|
265 |
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QUIC: connection migration.
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diff
changeset
|
266 |
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diff
changeset
|
267 ngx_int_t |
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|
268 ngx_quic_set_path(ngx_connection_t *c, ngx_quic_header_t *pkt) |
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changeset
|
269 { |
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diff
changeset
|
270 off_t len; |
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changeset
|
271 ngx_queue_t *q; |
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changeset
|
272 ngx_quic_path_t *path, *probe; |
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|
273 ngx_quic_socket_t *qsock; |
8972
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QUIC: additional limit for probing packets.
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diff
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|
274 ngx_quic_send_ctx_t *ctx; |
8763
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|
275 ngx_quic_client_id_t *cid; |
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QUIC: connection migration.
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|
276 ngx_quic_connection_t *qc; |
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|
277 |
8939
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QUIC: improved path validation.
Vladimir Homutov <vl@nginx.com>
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8933
diff
changeset
|
278 qc = ngx_quic_get_connection(c); |
8763
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QUIC: connection migration.
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|
279 qsock = ngx_quic_get_socket(c); |
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QUIC: connection migration.
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|
280 |
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changeset
|
281 len = pkt->raw->last - pkt->raw->start; |
8763
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QUIC: connection migration.
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changeset
|
282 |
9017
c2f5d79cde64
QUIC: separate UDP framework for QUIC.
Roman Arutyunyan <arut@nginx.com>
parents:
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diff
changeset
|
283 if (c->udp->buffer == NULL) { |
8971
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QUIC: reworked migration handling.
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changeset
|
284 /* first ever packet in connection, path already exists */ |
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QUIC: reworked migration handling.
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diff
changeset
|
285 path = qc->path; |
8913
40445fc7c403
QUIC: fixed migration during NAT rebinding.
Vladimir Homutov <vl@nginx.com>
parents:
8912
diff
changeset
|
286 goto update; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
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diff
changeset
|
287 } |
4117aa7fa38e
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diff
changeset
|
288 |
8971
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QUIC: reworked migration handling.
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changeset
|
289 probe = NULL; |
8777
d5f93733c17d
QUIC: relaxed client id requirements.
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|
290 |
8971
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diff
changeset
|
291 for (q = ngx_queue_head(&qc->paths); |
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changeset
|
292 q != ngx_queue_sentinel(&qc->paths); |
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changeset
|
293 q = ngx_queue_next(q)) |
1e2f4e9c8195
QUIC: reworked migration handling.
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changeset
|
294 { |
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diff
changeset
|
295 path = ngx_queue_data(q, ngx_quic_path_t, queue); |
8763
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QUIC: connection migration.
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|
296 |
9017
c2f5d79cde64
QUIC: separate UDP framework for QUIC.
Roman Arutyunyan <arut@nginx.com>
parents:
9015
diff
changeset
|
297 if (ngx_cmp_sockaddr(&qsock->sockaddr.sockaddr, qsock->socklen, |
8971
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QUIC: reworked migration handling.
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diff
changeset
|
298 path->sockaddr, path->socklen, 1) |
1e2f4e9c8195
QUIC: reworked migration handling.
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diff
changeset
|
299 == NGX_OK) |
1e2f4e9c8195
QUIC: reworked migration handling.
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diff
changeset
|
300 { |
1e2f4e9c8195
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Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
301 goto update; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
302 } |
8763
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QUIC: connection migration.
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diff
changeset
|
303 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
304 if (path->tag == NGX_QUIC_PATH_PROBE) { |
1e2f4e9c8195
QUIC: reworked migration handling.
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diff
changeset
|
305 probe = path; |
8777
d5f93733c17d
QUIC: relaxed client id requirements.
Vladimir Homutov <vl@nginx.com>
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diff
changeset
|
306 } |
8763
4117aa7fa38e
QUIC: connection migration.
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diff
changeset
|
307 } |
4117aa7fa38e
QUIC: connection migration.
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diff
changeset
|
308 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
309 /* packet from new path, drop current probe, if any */ |
1e2f4e9c8195
QUIC: reworked migration handling.
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parents:
8944
diff
changeset
|
310 |
8972
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
311 ctx = ngx_quic_get_send_ctx(qc, pkt->level); |
077a1e403446
QUIC: additional limit for probing packets.
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parents:
8971
diff
changeset
|
312 |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
313 /* |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
314 * only accept highest-numbered packets to prevent connection id |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
315 * exhaustion by excessive probing packets from unknown paths |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
316 */ |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
317 if (pkt->pn != ctx->largest_pn) { |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
318 return NGX_DONE; |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
319 } |
077a1e403446
QUIC: additional limit for probing packets.
Vladimir Homutov <vl@nginx.com>
parents:
8971
diff
changeset
|
320 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
321 if (probe && ngx_quic_free_path(c, probe) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
322 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
323 } |
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 /* new path requires new client id */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
326 cid = ngx_quic_next_client_id(c); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
327 if (cid == NULL) { |
9029
28fc35b71d75
QUIC: "info" logging level on insufficient client connection ids.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9017
diff
changeset
|
328 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
329 "quic no available client ids for new path"); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
330 /* stop processing of this datagram */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
331 return NGX_DONE; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
332 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
333 |
9017
c2f5d79cde64
QUIC: separate UDP framework for QUIC.
Roman Arutyunyan <arut@nginx.com>
parents:
9015
diff
changeset
|
334 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
|
335 if (path == NULL) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
336 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
337 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
338 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
339 path->tag = NGX_QUIC_PATH_PROBE; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
340 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
341 /* |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
342 * client arrived using new path and previously seen DCID, |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
343 * this indicates NAT rebinding (or bad client) |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
344 */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
345 if (qsock->used) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
346 pkt->rebound = 1; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
347 } |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
348 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
349 update: |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
350 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
351 qsock->used = 1; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
352 pkt->path = path; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
353 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
354 /* TODO: this may be too late in some cases; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
355 * for example, if error happens during decrypt(), we cannot |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
356 * send CC, if error happens in 1st packet, due to amplification |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
357 * limit, because path->received = 0 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
358 * |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
359 * should we account garbage as received or only decrypting packets? |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
360 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
361 path->received += len; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
362 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
363 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
|
364 "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
|
365 len, (int64_t) qsock->sid.seqnum, path->seqnum); |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
366 ngx_quic_path_dbg(c, "status", path); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
367 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
368 return NGX_OK; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
369 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
370 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
371 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
372 ngx_int_t |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
373 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
|
374 { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
375 ngx_quic_connection_t *qc; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
376 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
377 qc = ngx_quic_get_connection(c); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
378 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
379 ngx_queue_remove(&path->queue); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
380 ngx_queue_insert_head(&qc->free_paths, &path->queue); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
381 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
382 /* |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
383 * 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
|
384 * this also requests new CIDs from client |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
385 */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
386 if (path->cid) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
387 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
|
388 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
389 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
390 } |
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 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
|
393 "quic path seq:%uL addr:%V retired", |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
394 path->seqnum, &path->addr_text); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
395 |
8737
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
396 return NGX_OK; |
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
397 } |
76f476ce4d31
QUIC: distinct files for connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
398 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
399 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
400 static void |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
401 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
|
402 { |
9015
a2fbae359828
QUIC: fixed indentation.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8997
diff
changeset
|
403 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
404 c->socklen = path->socklen; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
405 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
406 if (c->addr_text.data) { |
9099
9462c514a653
QUIC: fixed addr_text after migration (ticket #2488).
Roman Arutyunyan <arut@nginx.com>
parents:
9098
diff
changeset
|
407 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
|
408 c->addr_text.data, |
9462c514a653
QUIC: fixed addr_text after migration (ticket #2488).
Roman Arutyunyan <arut@nginx.com>
parents:
9098
diff
changeset
|
409 c->listening->addr_text_max_len, 0); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
410 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
411 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
412 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
|
413 "quic send path set to seq:%uL addr:%V", |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
414 path->seqnum, &path->addr_text); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
415 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
416 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
417 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
418 ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
419 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
|
420 { |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
421 ngx_quic_path_t *next, *bkp; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
422 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
423 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
424 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
425 /* got non-probing packet via non-active path */ |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
426 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
427 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
428 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
429 ctx = ngx_quic_get_send_ctx(qc, pkt->level); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
430 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
431 /* |
8797
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
432 * RFC 9000, 9.3. Responding to Connection Migration |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
433 * |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
434 * 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
|
435 * response to the highest-numbered non-probing packet. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
436 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
437 if (pkt->pn != ctx->largest_pn) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
438 return NGX_OK; |
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 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
441 next = pkt->path; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
442 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
443 /* |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
444 * RFC 9000, 9.3.3: |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
445 * |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
446 * In response to an apparent migration, endpoints MUST validate the |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
447 * previously active path using a PATH_CHALLENGE frame. |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
448 */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
449 if (pkt->rebound) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
450 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
451 /* NAT rebinding: client uses new path with old SID */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
452 if (ngx_quic_validate_path(c, qc->path) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
453 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
454 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
455 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
456 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
457 if (qc->path->validated) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
458 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
459 if (next->tag != NGX_QUIC_PATH_BACKUP) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
460 /* can delete backup path, if any */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
461 bkp = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
462 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
463 if (bkp && ngx_quic_free_path(c, bkp) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
464 return NGX_ERROR; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
465 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
466 } |
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 qc->path->tag = NGX_QUIC_PATH_BACKUP; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
469 ngx_quic_path_dbg(c, "is now backup", qc->path); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
470 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
471 } else { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
472 if (ngx_quic_free_path(c, qc->path) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
473 return NGX_ERROR; |
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 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
476 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
477 /* switch active path to migrated */ |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
478 qc->path = next; |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
479 qc->path->tag = NGX_QUIC_PATH_ACTIVE; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
480 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
481 ngx_quic_set_connection_path(c, next); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
482 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
483 if (!next->validated && next->state != NGX_QUIC_PATH_VALIDATING) { |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
484 if (ngx_quic_validate_path(c, next) != NGX_OK) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
485 return NGX_ERROR; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
486 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
487 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
488 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
489 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
|
490 "quic migrated to path seq:%uL addr:%V", |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
491 qc->path->seqnum, &qc->path->addr_text); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
492 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
493 ngx_quic_path_dbg(c, "is now active", qc->path); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
494 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
495 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
496 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
497 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
498 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
499 static ngx_int_t |
8944
b7284807b4fa
QUIC: refactored ngx_quic_validate_path().
Vladimir Homutov <vl@nginx.com>
parents:
8943
diff
changeset
|
500 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
|
501 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
502 ngx_msec_t pto; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
503 ngx_quic_send_ctx_t *ctx; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
504 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
505 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
506 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
507 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
508 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
|
509 "quic initiated validation of path seq:%uL", path->seqnum); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
510 |
9096
c6db94ec3841
QUIC: separated path validation retransmit backoff.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9029
diff
changeset
|
511 path->tries = 0; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
512 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
513 if (RAND_bytes(path->challenge1, 8) != 1) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
514 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
515 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
516 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
517 if (RAND_bytes(path->challenge2, 8) != 1) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
518 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
519 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
520 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
521 if (ngx_quic_send_path_challenge(c, path) != NGX_OK) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
522 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
523 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
524 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
525 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
|
526 pto = ngx_max(ngx_quic_pto(c, ctx), 1000); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
527 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
528 path->expires = ngx_current_msec + pto; |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
529 path->state = NGX_QUIC_PATH_VALIDATING; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
530 |
9098
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
531 ngx_quic_set_path_timer(c); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
532 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
533 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
534 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
535 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
536 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
537 static ngx_int_t |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
538 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
|
539 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
540 ngx_quic_frame_t frame; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
541 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
542 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
8997
fab36e4abf83
QUIC: got rid of hash symbol in backup and logging.
Vladimir Homutov <vl@nginx.com>
parents:
8985
diff
changeset
|
543 "quic path seq:%uL send path_challenge tries:%ui", |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
544 path->seqnum, path->tries); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
545 |
8933
02a9ad88e2df
QUIC: added missing frame initialization.
Vladimir Homutov <vl@nginx.com>
parents:
8932
diff
changeset
|
546 ngx_memzero(&frame, sizeof(ngx_quic_frame_t)); |
02a9ad88e2df
QUIC: added missing frame initialization.
Vladimir Homutov <vl@nginx.com>
parents:
8932
diff
changeset
|
547 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
548 frame.level = ssl_encryption_application; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
549 frame.type = NGX_QUIC_FT_PATH_CHALLENGE; |
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 ngx_memcpy(frame.u.path_challenge.data, path->challenge1, 8); |
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 /* |
8797
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
554 * RFC 9000, 8.2.1. Initiating Path Validation |
4715f3e669f1
QUIC: updated specification references.
Sergey Kandaurov <pluknet@nginx.com>
parents:
8778
diff
changeset
|
555 * |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
556 * An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
557 * to at least the smallest allowed maximum datagram size of 1200 bytes, |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
558 * unless the anti-amplification limit for the path does not permit |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
559 * sending a datagram of this size. |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
560 */ |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
561 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
562 /* same applies to PATH_RESPONSE frames */ |
9146
f3412ec3b6d1
QUIC: allowed ngx_quic_frame_sendto() to return NGX_AGAIN.
Roman Arutyunyan <arut@nginx.com>
parents:
9144
diff
changeset
|
563 if (ngx_quic_frame_sendto(c, &frame, 1200, path) == NGX_ERROR) { |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
564 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
565 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
566 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
567 ngx_memcpy(frame.u.path_challenge.data, path->challenge2, 8); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
568 |
9146
f3412ec3b6d1
QUIC: allowed ngx_quic_frame_sendto() to return NGX_AGAIN.
Roman Arutyunyan <arut@nginx.com>
parents:
9144
diff
changeset
|
569 if (ngx_quic_frame_sendto(c, &frame, 1200, path) == NGX_ERROR) { |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
570 return NGX_ERROR; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
571 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
572 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
573 return NGX_OK; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
574 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
575 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
576 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
577 void |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
578 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
|
579 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
580 ngx_quic_connection_t *qc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
581 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
582 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
583 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
584 if (path->max_mtu) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
585 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
|
586 path->state = NGX_QUIC_PATH_IDLE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
587 ngx_quic_set_path_timer(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
588 return; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
589 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
590 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
591 path->mtud = (path->mtu + path->max_mtu) / 2; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
592 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
593 } else { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
594 path->mtud = path->mtu * 2; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
595 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
596 if (path->mtud >= qc->ctp.max_udp_payload_size) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
597 path->mtud = qc->ctp.max_udp_payload_size; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
598 path->max_mtu = qc->ctp.max_udp_payload_size; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
599 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
600 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
601 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
602 path->state = NGX_QUIC_PATH_WAITING; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
603 path->expires = ngx_current_msec + NGX_QUIC_PATH_MTU_DELAY; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
604 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
605 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
606 "quic path seq:%uL schedule mtu:%uz", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
607 path->seqnum, path->mtud); |
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_set_path_timer(c); |
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 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
612 |
9098
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
613 static void |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
614 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
|
615 { |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
616 ngx_msec_t now; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
617 ngx_queue_t *q; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
618 ngx_msec_int_t left, next; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
619 ngx_quic_path_t *path; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
620 ngx_quic_connection_t *qc; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
621 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
622 qc = ngx_quic_get_connection(c); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
623 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
624 now = ngx_current_msec; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
625 next = -1; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
626 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
627 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
|
628 q != ngx_queue_sentinel(&qc->paths); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
629 q = ngx_queue_next(q)) |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
630 { |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
631 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
|
632 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
633 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
|
634 continue; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
635 } |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
636 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
637 left = path->expires - now; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
638 left = ngx_max(left, 1); |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
639 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
640 if (next == -1 || left < next) { |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
641 next = left; |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
642 } |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
643 } |
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 if (next != -1) { |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
646 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
|
647 |
d565cf69ff5d
QUIC: reschedule path validation on path insertion/removal.
Sergey Kandaurov <pluknet@nginx.com>
parents:
9097
diff
changeset
|
648 } 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
|
649 ngx_del_timer(&qc->path_validation); |
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 } |
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 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
654 void |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
655 ngx_quic_path_handler(ngx_event_t *ev) |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
656 { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
657 ngx_msec_t now; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
658 ngx_queue_t *q; |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
659 ngx_msec_int_t left; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
660 ngx_quic_path_t *path; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
661 ngx_connection_t *c; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
662 ngx_quic_connection_t *qc; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
663 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
664 c = ev->data; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
665 qc = ngx_quic_get_connection(c); |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
666 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
667 now = ngx_current_msec; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
668 |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
669 q = ngx_queue_head(&qc->paths); |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
670 |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
671 while (q != ngx_queue_sentinel(&qc->paths)) { |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
672 |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
673 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
|
674 q = ngx_queue_next(q); |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
675 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
676 if (path->state == NGX_QUIC_PATH_IDLE) { |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
677 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
678 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
679 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
680 left = path->expires - now; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
681 |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
682 if (left > 0) { |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
683 continue; |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
684 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
685 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
686 switch (path->state) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
687 case NGX_QUIC_PATH_VALIDATING: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
688 if (ngx_quic_expire_path_validation(c, path) != NGX_OK) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
689 goto failed; |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
690 } |
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
691 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
692 break; |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
693 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
694 case NGX_QUIC_PATH_WAITING: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
695 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
|
696 goto failed; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
697 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
698 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
699 break; |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
700 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
701 case NGX_QUIC_PATH_MTUD: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
702 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
|
703 goto failed; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
704 } |
8971
1e2f4e9c8195
QUIC: reworked migration handling.
Vladimir Homutov <vl@nginx.com>
parents:
8944
diff
changeset
|
705 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
706 break; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
707 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
708 default: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
709 break; |
8763
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 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
712 |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
713 ngx_quic_set_path_timer(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
714 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
715 return; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
716 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
717 failed: |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
718 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
719 ngx_quic_close_connection(c, NGX_ERROR); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
720 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
721 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
722 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
723 static ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
724 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
|
725 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
726 ngx_msec_int_t pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
727 ngx_quic_path_t *bkp; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
728 ngx_quic_send_ctx_t *ctx; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
729 ngx_quic_connection_t *qc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
730 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
731 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
732 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
733 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
734 if (++path->tries < NGX_QUIC_PATH_RETRIES) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
735 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
|
736 path->expires = ngx_current_msec + pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
737 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
738 (void) ngx_quic_send_path_challenge(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
739 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
740 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
741 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
742 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
743 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
744 "quic path seq:%uL validation failed", path->seqnum); |
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 /* found expired path */ |
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 path->validated = 0; |
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 /* RFC 9000, 9.3.2. On-Path Address Spoofing |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
752 * |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
753 * 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
|
754 * migration, an endpoint MUST revert to using the last validated |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
755 * peer address when validation of a new peer address fails. |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
756 */ |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
757 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
758 if (qc->path == path) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
759 /* active path validation failed */ |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
760 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
761 bkp = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP); |
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 (bkp == NULL) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
764 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
765 qc->error_reason = "no viable path"; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
766 return NGX_ERROR; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
767 } |
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 qc->path = bkp; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
770 qc->path->tag = NGX_QUIC_PATH_ACTIVE; |
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_quic_set_connection_path(c, qc->path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
773 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
774 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
775 "quic path seq:%uL addr:%V is restored from backup", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
776 qc->path->seqnum, &qc->path->addr_text); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
777 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
778 ngx_quic_path_dbg(c, "is active", qc->path); |
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 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
781 return ngx_quic_free_path(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
782 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
783 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
784 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
785 static ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
786 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
|
787 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
788 ngx_int_t rc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
789 ngx_uint_t i; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
790 ngx_msec_t pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
791 ngx_quic_send_ctx_t *ctx; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
792 ngx_quic_connection_t *qc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
793 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
794 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
795 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
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 path->tries = 0; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
798 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
799 for ( ;; ) { |
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 for (i = 0; i < NGX_QUIC_PATH_RETRIES; i++) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
802 path->mtu_pnum[i] = NGX_QUIC_UNSET_PN; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
803 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
804 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
805 rc = ngx_quic_send_path_mtu_probe(c, path); |
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 if (rc == NGX_ERROR) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
808 return NGX_ERROR; |
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 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
811 if (rc == NGX_OK) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
812 pto = ngx_quic_pto(c, ctx); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
813 path->expires = ngx_current_msec + pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
814 path->state = NGX_QUIC_PATH_MTUD; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
815 return NGX_OK; |
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 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
818 /* rc == NGX_DECLINED */ |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
819 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
820 path->max_mtu = path->mtud; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
821 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
822 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
|
823 path->state = NGX_QUIC_PATH_IDLE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
824 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
825 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
826 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
827 path->mtud = (path->mtu + path->max_mtu) / 2; |
8763
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
828 } |
4117aa7fa38e
QUIC: connection migration.
Vladimir Homutov <vl@nginx.com>
parents:
8747
diff
changeset
|
829 } |
9147
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
830 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
831 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
832 static ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
833 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
|
834 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
835 ngx_int_t rc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
836 ngx_msec_int_t pto; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
837 ngx_quic_send_ctx_t *ctx; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
838 ngx_quic_connection_t *qc; |
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 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
841 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
842 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
843 if (++path->tries < NGX_QUIC_PATH_RETRIES) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
844 rc = ngx_quic_send_path_mtu_probe(c, path); |
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 if (rc == NGX_ERROR) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
847 return NGX_ERROR; |
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 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
850 if (rc == NGX_OK) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
851 pto = ngx_quic_pto(c, ctx) << path->tries; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
852 path->expires = ngx_current_msec + pto; |
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 /* rc == NGX_DECLINED */ |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
857 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
858 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
859 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
860 "quic path seq:%uL expired mtu:%uz", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
861 path->seqnum, path->mtud); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
862 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
863 path->max_mtu = path->mtud; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
864 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
865 ngx_quic_discover_path_mtu(c, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
866 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
867 return NGX_OK; |
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 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
870 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
871 static ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
872 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
|
873 { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
874 ngx_int_t rc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
875 ngx_uint_t log_error; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
876 ngx_quic_frame_t frame; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
877 ngx_quic_send_ctx_t *ctx; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
878 ngx_quic_connection_t *qc; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
879 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
880 ngx_memzero(&frame, sizeof(ngx_quic_frame_t)); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
881 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
882 frame.level = ssl_encryption_application; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
883 frame.type = NGX_QUIC_FT_PING; |
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 qc = ngx_quic_get_connection(c); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
886 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
887 path->mtu_pnum[path->tries] = ctx->pnum; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
888 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
889 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
890 "quic path seq:%uL send probe " |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
891 "mtu:%uz pnum:%uL tries:%ui", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
892 path->seqnum, path->mtud, ctx->pnum, path->tries); |
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 log_error = c->log_error; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
895 c->log_error = NGX_ERROR_IGNORE_EMSGSIZE; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
896 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
897 rc = ngx_quic_frame_sendto(c, &frame, path->mtud, path); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
898 c->log_error = log_error; |
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 if (rc == NGX_ERROR) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
901 if (c->write->error) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
902 c->write->error = 0; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
903 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
904 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
905 "quic path seq:%uL rejected mtu:%uz", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
906 path->seqnum, path->mtud); |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
907 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
908 return NGX_DECLINED; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
909 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
910 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
911 return NGX_ERROR; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
912 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
913 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
914 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
915 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
916 |
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 ngx_int_t |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
919 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
|
920 uint64_t min, uint64_t max) |
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 uint64_t pnum; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
923 ngx_uint_t i; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
924 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
925 if (path->state != NGX_QUIC_PATH_MTUD) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
926 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
927 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
928 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
929 for (i = 0; i < NGX_QUIC_PATH_RETRIES; i++) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
930 pnum = path->mtu_pnum[i]; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
931 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
932 if (pnum == NGX_QUIC_UNSET_PN) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
933 break; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
934 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
935 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
936 if (pnum < min || pnum > max) { |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
937 continue; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
938 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
939 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
940 path->mtu = path->mtud; |
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 ack mtu:%uz", |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
944 path->seqnum, path->mtu); |
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 ngx_quic_discover_path_mtu(c, path); |
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 break; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
949 } |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
950 |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
951 return NGX_OK; |
58afcd72446f
QUIC: path MTU discovery.
Roman Arutyunyan <arut@nginx.com>
parents:
9146
diff
changeset
|
952 } |