nginx: src/event/quic/ngx_event_quic

annotate src/event/quic/ngx_event_quic_migration.c @ 9194:a6f79f044de5

QUIC: path revalidation after expansion failure. As per RFC 9000, Section 8.2.1: When an endpoint is unable to expand the datagram size to 1200 bytes due to the anti-amplification limit, the path MTU will not be validated. To ensure that the path MTU is large enough, the endpoint MUST perform a second path validation by sending a PATH_CHALLENGE frame in a datagram of at least 1200 bytes.

author	Roman Arutyunyan <arut@nginx.com>
date	Wed, 29 Nov 2023 10:58:21 +0400
parents	efcdaa66df2e
children	ff452f283aa9

rev	line source
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	1
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	2 /*
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	3 * Copyright (C) Nginx, Inc.
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	4 */
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	5
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	6
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	7 #include <ngx_config.h>
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	8 #include <ngx_core.h>
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	9 #include <ngx_event.h>
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	10 #include <ngx_event_quic_connection.h>
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	11
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	12
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	13 #define NGX_QUIC_PATH_MTU_DELAY 100
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	14 #define NGX_QUIC_PATH_MTU_PRECISION 16
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	15
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	16
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	17 static void ngx_quic_set_connection_path(ngx_connection_t *c,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	18 ngx_quic_path_t *path);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	19 static ngx_int_t ngx_quic_validate_path(ngx_connection_t *c,
8944 b7284807b4fa QUIC: refactored ngx_quic_validate_path(). Vladimir Homutov <vl@nginx.com> parents: 8943 diff changeset	20 ngx_quic_path_t *path);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	21 static ngx_int_t ngx_quic_send_path_challenge(ngx_connection_t *c,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	22 ngx_quic_path_t *path);
9098 d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	23 static void ngx_quic_set_path_timer(ngx_connection_t *c);
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	24 static ngx_int_t ngx_quic_expire_path_validation(ngx_connection_t *c,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	25 ngx_quic_path_t *path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	26 static ngx_int_t ngx_quic_expire_path_mtu_delay(ngx_connection_t *c,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	27 ngx_quic_path_t *path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	28 static ngx_int_t ngx_quic_expire_path_mtu_discovery(ngx_connection_t *c,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	29 ngx_quic_path_t *path);
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	30 static ngx_quic_path_t ngx_quic_get_path(ngx_connection_t c, ngx_uint_t tag);
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	31 static ngx_int_t ngx_quic_send_path_mtu_probe(ngx_connection_t *c,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	32 ngx_quic_path_t *path);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	33
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	34
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	35 ngx_int_t
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	36 ngx_quic_handle_path_challenge_frame(ngx_connection_t *c,
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	37 ngx_quic_header_t pkt, ngx_quic_path_challenge_frame_t f)
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	38 {
9189 fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	39 size_t min;
9192 efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	40 ngx_quic_frame_t *fp;
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	41 ngx_quic_connection_t *qc;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	42
9191 618132842e7c QUIC: ignore duplicate PATH_CHALLENGE frames. Roman Arutyunyan <arut@nginx.com> parents: 9190 diff changeset	43 if (pkt->level != ssl_encryption_application \|\| pkt->path_challenged) {
618132842e7c QUIC: ignore duplicate PATH_CHALLENGE frames. Roman Arutyunyan <arut@nginx.com> parents: 9190 diff changeset	44 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
618132842e7c QUIC: ignore duplicate PATH_CHALLENGE frames. Roman Arutyunyan <arut@nginx.com> parents: 9190 diff changeset	45 "quic ignoring PATH_CHALLENGE");
618132842e7c QUIC: ignore duplicate PATH_CHALLENGE frames. Roman Arutyunyan <arut@nginx.com> parents: 9190 diff changeset	46 return NGX_OK;
618132842e7c QUIC: ignore duplicate PATH_CHALLENGE frames. Roman Arutyunyan <arut@nginx.com> parents: 9190 diff changeset	47 }
618132842e7c QUIC: ignore duplicate PATH_CHALLENGE frames. Roman Arutyunyan <arut@nginx.com> parents: 9190 diff changeset	48
618132842e7c QUIC: ignore duplicate PATH_CHALLENGE frames. Roman Arutyunyan <arut@nginx.com> parents: 9190 diff changeset	49 pkt->path_challenged = 1;
618132842e7c QUIC: ignore duplicate PATH_CHALLENGE frames. Roman Arutyunyan <arut@nginx.com> parents: 9190 diff changeset	50
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	51 qc = ngx_quic_get_connection(c);
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	52
9192 efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	53 fp = ngx_quic_alloc_frame(c);
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	54 if (fp == NULL) {
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	55 return NGX_ERROR;
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	56 }
8933 02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8932 diff changeset	57
9192 efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	58 fp->level = ssl_encryption_application;
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	59 fp->type = NGX_QUIC_FT_PATH_RESPONSE;
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	60 fp->u.path_response = *f;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	61
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	62 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	63 * RFC 9000, 8.2.2. Path Validation Responses
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	64 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	65 * A PATH_RESPONSE frame MUST be sent on the network path where the
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	66 * PATH_CHALLENGE frame was received.
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	67 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	68
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	69 /*
8901 a951e0809044 QUIC: fixed PATH_RESPONSE frame expansion. Vladimir Homutov <vl@nginx.com> parents: 8822 diff changeset	70 * An endpoint MUST expand datagrams that contain a PATH_RESPONSE frame
a951e0809044 QUIC: fixed PATH_RESPONSE frame expansion. Vladimir Homutov <vl@nginx.com> parents: 8822 diff changeset	71 * to at least the smallest allowed maximum datagram size of 1200 bytes.
9189 fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	72 * ...
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	73 * However, an endpoint MUST NOT expand the datagram containing the
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	74 * PATH_RESPONSE if the resulting data exceeds the anti-amplification limit.
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	75 */
9189 fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	76
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	77 min = (ngx_quic_path_limit(c, pkt->path, 1200) < 1200) ? 0 : 1200;
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	78
9192 efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	79 if (ngx_quic_frame_sendto(c, fp, min, pkt->path) == NGX_ERROR) {
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	80 return NGX_ERROR;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	81 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	82
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	83 if (pkt->path == qc->path) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	84 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	85 * RFC 9000, 9.3.3. Off-Path Packet Forwarding
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	86 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	87 * An endpoint that receives a PATH_CHALLENGE on an active path SHOULD
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	88 * send a non-probing packet in response.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	89 */
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	90
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	91 fp = ngx_quic_alloc_frame(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	92 if (fp == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	93 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	94 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	95
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	96 fp->level = ssl_encryption_application;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	97 fp->type = NGX_QUIC_FT_PING;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	98
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	99 ngx_quic_queue_frame(qc, fp);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	100 }
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	101
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	102 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	103 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	104
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	105
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	106 ngx_int_t
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	107 ngx_quic_handle_path_response_frame(ngx_connection_t *c,
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	108 ngx_quic_path_challenge_frame_t *f)
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	109 {
8943 118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	110 ngx_uint_t rst;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	111 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	112 ngx_quic_path_t path, prev;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	113 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	114
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	115 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	116
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	117 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	118 * RFC 9000, 8.2.3. Successful Path Validation
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	119 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	120 * A PATH_RESPONSE frame received on any network path validates the path
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	121 * on which the PATH_CHALLENGE was sent.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	122 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	123
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	124 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	125 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	126 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	127 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	128 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	129
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	130 if (path->state != NGX_QUIC_PATH_VALIDATING) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	131 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	132 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	133
9189 fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	134 if (ngx_memcmp(path->challenge[0], f->data, sizeof(f->data)) == 0
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	135 \|\| ngx_memcmp(path->challenge[1], f->data, sizeof(f->data)) == 0)
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	136 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	137 goto valid;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	138 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	139 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	140
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	141 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
9015 a2fbae359828 QUIC: fixed indentation. Sergey Kandaurov <pluknet@nginx.com> parents: 8997 diff changeset	142 "quic stale PATH_RESPONSE ignored");
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	143
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	144 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	145
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	146 valid:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	147
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	148 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	149 * RFC 9000, 9.4. Loss Detection and Congestion Control
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	150 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	151 * On confirming a peer's ownership of its new address,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	152 * an endpoint MUST immediately reset the congestion controller
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	153 * and round-trip time estimator for the new path to initial values
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	154 * unless the only change in the peer's address is its port number.
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	155 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	156
8943 118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	157 rst = 1;
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	158
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	159 prev = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	160
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	161 if (prev != NULL) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	162
8943 118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	163 if (ngx_cmp_sockaddr(prev->sockaddr, prev->socklen,
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	164 path->sockaddr, path->socklen, 0)
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	165 == NGX_OK)
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	166 {
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	167 /* address did not change */
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	168 rst = 0;
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	169
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	170 path->mtu = prev->mtu;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	171 path->max_mtu = prev->max_mtu;
9194 a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	172 path->mtu_unvalidated = 0;
8943 118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	173 }
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	174 }
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	175
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	176 if (rst) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	177 ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	178
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	179 qc->congestion.window = ngx_min(10 * qc->tp.max_udp_payload_size,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	180 ngx_max(2 * qc->tp.max_udp_payload_size,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	181 14720));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	182 qc->congestion.ssthresh = (size_t) -1;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	183 qc->congestion.recovery_start = ngx_current_msec;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	184 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	185
9194 a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	186 path->validated = 1;
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	187
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	188 if (path->mtu_unvalidated) {
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	189 path->mtu_unvalidated = 0;
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	190 return ngx_quic_validate_path(c, path);
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	191 }
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	192
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	193 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	194 * RFC 9000, 9.3. Responding to Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	195 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	196 * After verifying a new client address, the server SHOULD
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	197 * send new address validation tokens (Section 8) to the client.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	198 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	199
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	200 if (ngx_quic_send_new_token(c, path) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	201 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	202 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	203
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	204 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	205 "quic path seq:%uL addr:%V successfully validated",
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	206 path->seqnum, &path->addr_text);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	207
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	208 ngx_quic_path_dbg(c, "is validated", path);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	209
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	210 ngx_quic_discover_path_mtu(c, path);
9098 d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	211
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	212 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	213 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	214
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	215
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	216 ngx_quic_path_t *
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	217 ngx_quic_new_path(ngx_connection_t *c,
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	218 struct sockaddr sockaddr, socklen_t socklen, ngx_quic_client_id_t cid)
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	219 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	220 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	221 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	222 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	223
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	224 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	225
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	226 if (!ngx_queue_empty(&qc->free_paths)) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	227
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	228 q = ngx_queue_head(&qc->free_paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	229 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	230
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	231 ngx_queue_remove(&path->queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	232
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	233 ngx_memzero(path, sizeof(ngx_quic_path_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	234
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	235 } else {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	236
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	237 path = ngx_pcalloc(c->pool, sizeof(ngx_quic_path_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	238 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	239 return NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	240 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	241 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	242
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	243 ngx_queue_insert_tail(&qc->paths, &path->queue);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	244
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	245 path->cid = cid;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	246 cid->used = 1;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	247
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	248 path->seqnum = qc->path_seqnum++;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	249
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	250 path->sockaddr = &path->sa.sockaddr;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	251 path->socklen = socklen;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	252 ngx_memcpy(path->sockaddr, sockaddr, socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	253
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	254 path->addr_text.data = path->text;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	255 path->addr_text.len = ngx_sock_ntop(sockaddr, socklen, path->text,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	256 NGX_SOCKADDR_STRLEN, 1);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	257
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	258 path->mtu = NGX_QUIC_MIN_INITIAL_SIZE;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	259
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	260 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	261 "quic path seq:%uL created addr:%V",
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	262 path->seqnum, &path->addr_text);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	263 return path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	264 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	265
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	266
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	267 static ngx_quic_path_t *
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	268 ngx_quic_get_path(ngx_connection_t *c, ngx_uint_t tag)
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	269 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	270 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	271 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	272 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	273
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	274 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	275
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	276 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	277 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	278 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	279 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	280 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	281
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	282 if (path->tag == tag) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	283 return path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	284 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	285 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	286
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	287 return NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	288 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	289
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	290
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	291 ngx_int_t
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	292 ngx_quic_set_path(ngx_connection_t c, ngx_quic_header_t pkt)
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	293 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	294 off_t len;
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	295 ngx_queue_t *q;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	296 ngx_quic_path_t path, probe;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	297 ngx_quic_socket_t *qsock;
8972 077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	298 ngx_quic_send_ctx_t *ctx;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	299 ngx_quic_client_id_t *cid;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	300 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	301
8939 ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	302 qc = ngx_quic_get_connection(c);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	303 qsock = ngx_quic_get_socket(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	304
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	305 len = pkt->raw->last - pkt->raw->start;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	306
9017 c2f5d79cde64 QUIC: separate UDP framework for QUIC. Roman Arutyunyan <arut@nginx.com> parents: 9015 diff changeset	307 if (c->udp->buffer == NULL) {
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	308 /* first ever packet in connection, path already exists */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	309 path = qc->path;
8913 40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	310 goto update;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	311 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	312
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	313 probe = NULL;
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	314
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	315 for (q = ngx_queue_head(&qc->paths);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	316 q != ngx_queue_sentinel(&qc->paths);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	317 q = ngx_queue_next(q))
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	318 {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	319 path = ngx_queue_data(q, ngx_quic_path_t, queue);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	320
9017 c2f5d79cde64 QUIC: separate UDP framework for QUIC. Roman Arutyunyan <arut@nginx.com> parents: 9015 diff changeset	321 if (ngx_cmp_sockaddr(&qsock->sockaddr.sockaddr, qsock->socklen,
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	322 path->sockaddr, path->socklen, 1)
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	323 == NGX_OK)
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	324 {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	325 goto update;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	326 }
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	327
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	328 if (path->tag == NGX_QUIC_PATH_PROBE) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	329 probe = path;
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	330 }
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	331 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	332
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	333 /* packet from new path, drop current probe, if any */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	334
8972 077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	335 ctx = ngx_quic_get_send_ctx(qc, pkt->level);
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	336
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	337 /*
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	338 * only accept highest-numbered packets to prevent connection id
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	339 * exhaustion by excessive probing packets from unknown paths
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	340 */
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	341 if (pkt->pn != ctx->largest_pn) {
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	342 return NGX_DONE;
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	343 }
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	344
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	345 if (probe && ngx_quic_free_path(c, probe) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	346 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	347 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	348
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	349 /* new path requires new client id */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	350 cid = ngx_quic_next_client_id(c);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	351 if (cid == NULL) {
9029 28fc35b71d75 QUIC: "info" logging level on insufficient client connection ids. Sergey Kandaurov <pluknet@nginx.com> parents: 9017 diff changeset	352 ngx_log_error(NGX_LOG_INFO, c->log, 0,
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	353 "quic no available client ids for new path");
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	354 /* stop processing of this datagram */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	355 return NGX_DONE;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	356 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	357
9017 c2f5d79cde64 QUIC: separate UDP framework for QUIC. Roman Arutyunyan <arut@nginx.com> parents: 9015 diff changeset	358 path = ngx_quic_new_path(c, &qsock->sockaddr.sockaddr, qsock->socklen, cid);
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	359 if (path == NULL) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	360 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	361 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	362
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	363 path->tag = NGX_QUIC_PATH_PROBE;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	364
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	365 /*
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	366 * client arrived using new path and previously seen DCID,
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	367 * this indicates NAT rebinding (or bad client)
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	368 */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	369 if (qsock->used) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	370 pkt->rebound = 1;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	371 }
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	372
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	373 update:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	374
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	375 qsock->used = 1;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	376 pkt->path = path;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	377
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	378 /* TODO: this may be too late in some cases;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	379 * for example, if error happens during decrypt(), we cannot
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	380 * send CC, if error happens in 1st packet, due to amplification
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	381 * limit, because path->received = 0
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	382 *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	383 * should we account garbage as received or only decrypting packets?
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	384 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	385 path->received += len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	386
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	387 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	388 "quic packet len:%O via sock seq:%L path seq:%uL",
8985 da24a78720eb QUIC: fixed handling of initial source connection id. Vladimir Homutov <vl@nginx.com> parents: 8972 diff changeset	389 len, (int64_t) qsock->sid.seqnum, path->seqnum);
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	390 ngx_quic_path_dbg(c, "status", path);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	391
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	392 return NGX_OK;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	393 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	394
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	395
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	396 ngx_int_t
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	397 ngx_quic_free_path(ngx_connection_t c, ngx_quic_path_t path)
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	398 {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	399 ngx_quic_connection_t *qc;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	400
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	401 qc = ngx_quic_get_connection(c);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	402
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	403 ngx_queue_remove(&path->queue);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	404 ngx_queue_insert_head(&qc->free_paths, &path->queue);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	405
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	406 /*
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	407 * invalidate CID that is no longer usable for any other path;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	408 * this also requests new CIDs from client
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	409 */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	410 if (path->cid) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	411 if (ngx_quic_free_client_id(c, path->cid) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	412 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	413 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	414 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	415
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	416 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	417 "quic path seq:%uL addr:%V retired",
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	418 path->seqnum, &path->addr_text);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	419
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	420 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	421 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	422
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	423
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	424 static void
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	425 ngx_quic_set_connection_path(ngx_connection_t c, ngx_quic_path_t path)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	426 {
9015 a2fbae359828 QUIC: fixed indentation. Sergey Kandaurov <pluknet@nginx.com> parents: 8997 diff changeset	427 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	428 c->socklen = path->socklen;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	429
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	430 if (c->addr_text.data) {
9099 9462c514a653 QUIC: fixed addr_text after migration (ticket #2488). Roman Arutyunyan <arut@nginx.com> parents: 9098 diff changeset	431 c->addr_text.len = ngx_sock_ntop(c->sockaddr, c->socklen,
9462c514a653 QUIC: fixed addr_text after migration (ticket #2488). Roman Arutyunyan <arut@nginx.com> parents: 9098 diff changeset	432 c->addr_text.data,
9462c514a653 QUIC: fixed addr_text after migration (ticket #2488). Roman Arutyunyan <arut@nginx.com> parents: 9098 diff changeset	433 c->listening->addr_text_max_len, 0);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	434 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	435
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	436 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	437 "quic send path set to seq:%uL addr:%V",
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	438 path->seqnum, &path->addr_text);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	439 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	440
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	441
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	442 ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	443 ngx_quic_handle_migration(ngx_connection_t c, ngx_quic_header_t pkt)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	444 {
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	445 ngx_quic_path_t next, bkp;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	446 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	447 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	448
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	449 /* got non-probing packet via non-active path */
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	450
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	451 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	452
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	453 ctx = ngx_quic_get_send_ctx(qc, pkt->level);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	454
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	455 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	456 * RFC 9000, 9.3. Responding to Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	457 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	458 * An endpoint only changes the address to which it sends packets in
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	459 * response to the highest-numbered non-probing packet.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	460 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	461 if (pkt->pn != ctx->largest_pn) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	462 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	463 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	464
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	465 next = pkt->path;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	466
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	467 /*
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	468 * RFC 9000, 9.3.3:
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	469 *
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	470 * In response to an apparent migration, endpoints MUST validate the
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	471 * previously active path using a PATH_CHALLENGE frame.
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	472 */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	473 if (pkt->rebound) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	474
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	475 /* NAT rebinding: client uses new path with old SID */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	476 if (ngx_quic_validate_path(c, qc->path) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	477 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	478 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	479 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	480
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	481 if (qc->path->validated) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	482
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	483 if (next->tag != NGX_QUIC_PATH_BACKUP) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	484 /* can delete backup path, if any */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	485 bkp = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	486
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	487 if (bkp && ngx_quic_free_path(c, bkp) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	488 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	489 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	490 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	491
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	492 qc->path->tag = NGX_QUIC_PATH_BACKUP;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	493 ngx_quic_path_dbg(c, "is now backup", qc->path);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	494
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	495 } else {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	496 if (ngx_quic_free_path(c, qc->path) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	497 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	498 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	499 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	500
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	501 /* switch active path to migrated */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	502 qc->path = next;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	503 qc->path->tag = NGX_QUIC_PATH_ACTIVE;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	504
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	505 ngx_quic_set_connection_path(c, next);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	506
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	507 if (!next->validated && next->state != NGX_QUIC_PATH_VALIDATING) {
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	508 if (ngx_quic_validate_path(c, next) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	509 return NGX_ERROR;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	510 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	511 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	512
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	513 ngx_log_error(NGX_LOG_INFO, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	514 "quic migrated to path seq:%uL addr:%V",
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	515 qc->path->seqnum, &qc->path->addr_text);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	516
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	517 ngx_quic_path_dbg(c, "is now active", qc->path);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	518
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	519 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	520 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	521
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	522
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	523 static ngx_int_t
8944 b7284807b4fa QUIC: refactored ngx_quic_validate_path(). Vladimir Homutov <vl@nginx.com> parents: 8943 diff changeset	524 ngx_quic_validate_path(ngx_connection_t c, ngx_quic_path_t path)
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	525 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	526 ngx_msec_t pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	527 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	528 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	529
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	530 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	531
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	532 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	533 "quic initiated validation of path seq:%uL", path->seqnum);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	534
9096 c6db94ec3841 QUIC: separated path validation retransmit backoff. Sergey Kandaurov <pluknet@nginx.com> parents: 9029 diff changeset	535 path->tries = 0;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	536
9189 fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	537 if (RAND_bytes((u_char *) path->challenge, sizeof(path->challenge)) != 1) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	538 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	539 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	540
9154 f6b6f3dd7ca0 QUIC: ignore path validation socket error (ticket #2532). Roman Arutyunyan <arut@nginx.com> parents: 9147 diff changeset	541 (void) ngx_quic_send_path_challenge(c, path);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	542
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	543 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
9097 a9fef6ca45a8 QUIC: lower bound path validation PTO. Sergey Kandaurov <pluknet@nginx.com> parents: 9096 diff changeset	544 pto = ngx_max(ngx_quic_pto(c, ctx), 1000);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	545
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	546 path->expires = ngx_current_msec + pto;
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	547 path->state = NGX_QUIC_PATH_VALIDATING;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	548
9098 d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	549 ngx_quic_set_path_timer(c);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	550
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	551 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	552 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	553
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	554
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	555 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	556 ngx_quic_send_path_challenge(ngx_connection_t c, ngx_quic_path_t path)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	557 {
9192 efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	558 size_t min;
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	559 ngx_uint_t n;
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	560 ngx_quic_frame_t *frame;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	561
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	562 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	563 "quic path seq:%uL send path_challenge tries:%ui",
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	564 path->seqnum, path->tries);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	565
9189 fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	566 for (n = 0; n < 2; n++) {
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	567
9192 efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	568 frame = ngx_quic_alloc_frame(c);
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	569 if (frame == NULL) {
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	570 return NGX_ERROR;
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	571 }
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	572
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	573 frame->level = ssl_encryption_application;
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	574 frame->type = NGX_QUIC_FT_PATH_CHALLENGE;
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	575
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	576 ngx_memcpy(frame->u.path_challenge.data, path->challenge[n], 8);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	577
9189 fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	578 /*
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	579 * RFC 9000, 8.2.1. Initiating Path Validation
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	580 *
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	581 * An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	582 * to at least the smallest allowed maximum datagram size of 1200 bytes,
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	583 * unless the anti-amplification limit for the path does not permit
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	584 * sending a datagram of this size.
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	585 */
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	586
9194 a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	587 if (path->mtu_unvalidated
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	588 \|\| ngx_quic_path_limit(c, path, 1200) < 1200)
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	589 {
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	590 min = 0;
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	591 path->mtu_unvalidated = 1;
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	592
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	593 } else {
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	594 min = 1200;
a6f79f044de5 QUIC: path revalidation after expansion failure. Roman Arutyunyan <arut@nginx.com> parents: 9192 diff changeset	595 }
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	596
9192 efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	597 if (ngx_quic_frame_sendto(c, frame, min, path) == NGX_ERROR) {
9189 fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	598 return NGX_ERROR;
fcec773dd249 QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE. Roman Arutyunyan <arut@nginx.com> parents: 9154 diff changeset	599 }
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	600 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	601
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	602 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	603 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	604
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	605
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	606 void
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	607 ngx_quic_discover_path_mtu(ngx_connection_t c, ngx_quic_path_t path)
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	608 {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	609 ngx_quic_connection_t *qc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	610
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	611 qc = ngx_quic_get_connection(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	612
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	613 if (path->max_mtu) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	614 if (path->max_mtu - path->mtu <= NGX_QUIC_PATH_MTU_PRECISION) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	615 path->state = NGX_QUIC_PATH_IDLE;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	616 ngx_quic_set_path_timer(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	617 return;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	618 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	619
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	620 path->mtud = (path->mtu + path->max_mtu) / 2;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	621
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	622 } else {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	623 path->mtud = path->mtu * 2;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	624
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	625 if (path->mtud >= qc->ctp.max_udp_payload_size) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	626 path->mtud = qc->ctp.max_udp_payload_size;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	627 path->max_mtu = qc->ctp.max_udp_payload_size;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	628 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	629 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	630
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	631 path->state = NGX_QUIC_PATH_WAITING;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	632 path->expires = ngx_current_msec + NGX_QUIC_PATH_MTU_DELAY;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	633
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	634 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	635 "quic path seq:%uL schedule mtu:%uz",
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	636 path->seqnum, path->mtud);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	637
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	638 ngx_quic_set_path_timer(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	639 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	640
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	641
9098 d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	642 static void
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	643 ngx_quic_set_path_timer(ngx_connection_t *c)
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	644 {
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	645 ngx_msec_t now;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	646 ngx_queue_t *q;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	647 ngx_msec_int_t left, next;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	648 ngx_quic_path_t *path;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	649 ngx_quic_connection_t *qc;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	650
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	651 qc = ngx_quic_get_connection(c);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	652
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	653 now = ngx_current_msec;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	654 next = -1;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	655
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	656 for (q = ngx_queue_head(&qc->paths);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	657 q != ngx_queue_sentinel(&qc->paths);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	658 q = ngx_queue_next(q))
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	659 {
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	660 path = ngx_queue_data(q, ngx_quic_path_t, queue);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	661
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	662 if (path->state == NGX_QUIC_PATH_IDLE) {
9098 d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	663 continue;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	664 }
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	665
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	666 left = path->expires - now;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	667 left = ngx_max(left, 1);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	668
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	669 if (next == -1 \|\| left < next) {
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	670 next = left;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	671 }
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	672 }
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	673
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	674 if (next != -1) {
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	675 ngx_add_timer(&qc->path_validation, next);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	676
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	677 } else if (qc->path_validation.timer_set) {
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	678 ngx_del_timer(&qc->path_validation);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	679 }
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	680 }
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	681
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	682
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	683 void
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	684 ngx_quic_path_handler(ngx_event_t *ev)
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	685 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	686 ngx_msec_t now;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	687 ngx_queue_t *q;
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	688 ngx_msec_int_t left;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	689 ngx_quic_path_t *path;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	690 ngx_connection_t *c;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	691 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	692
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	693 c = ev->data;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	694 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	695
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	696 now = ngx_current_msec;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	697
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	698 q = ngx_queue_head(&qc->paths);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	699
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	700 while (q != ngx_queue_sentinel(&qc->paths)) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	701
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	702 path = ngx_queue_data(q, ngx_quic_path_t, queue);
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	703 q = ngx_queue_next(q);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	704
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	705 if (path->state == NGX_QUIC_PATH_IDLE) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	706 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	707 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	708
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	709 left = path->expires - now;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	710
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	711 if (left > 0) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	712 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	713 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	714
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	715 switch (path->state) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	716 case NGX_QUIC_PATH_VALIDATING:
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	717 if (ngx_quic_expire_path_validation(c, path) != NGX_OK) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	718 goto failed;
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	719 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	720
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	721 break;
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	722
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	723 case NGX_QUIC_PATH_WAITING:
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	724 if (ngx_quic_expire_path_mtu_delay(c, path) != NGX_OK) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	725 goto failed;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	726 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	727
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	728 break;
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	729
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	730 case NGX_QUIC_PATH_MTUD:
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	731 if (ngx_quic_expire_path_mtu_discovery(c, path) != NGX_OK) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	732 goto failed;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	733 }
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	734
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	735 break;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	736
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	737 default:
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	738 break;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	739 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	740 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	741
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	742 ngx_quic_set_path_timer(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	743
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	744 return;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	745
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	746 failed:
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	747
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	748 ngx_quic_close_connection(c, NGX_ERROR);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	749 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	750
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	751
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	752 static ngx_int_t
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	753 ngx_quic_expire_path_validation(ngx_connection_t c, ngx_quic_path_t path)
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	754 {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	755 ngx_msec_int_t pto;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	756 ngx_quic_path_t *bkp;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	757 ngx_quic_send_ctx_t *ctx;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	758 ngx_quic_connection_t *qc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	759
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	760 qc = ngx_quic_get_connection(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	761 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	762
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	763 if (++path->tries < NGX_QUIC_PATH_RETRIES) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	764 pto = ngx_max(ngx_quic_pto(c, ctx), 1000) << path->tries;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	765 path->expires = ngx_current_msec + pto;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	766
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	767 (void) ngx_quic_send_path_challenge(c, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	768
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	769 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	770 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	771
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	772 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	773 "quic path seq:%uL validation failed", path->seqnum);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	774
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	775 /* found expired path */
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	776
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	777 path->validated = 0;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	778
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	779
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	780 /* RFC 9000, 9.3.2. On-Path Address Spoofing
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	781 *
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	782 * To protect the connection from failing due to such a spurious
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	783 * migration, an endpoint MUST revert to using the last validated
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	784 * peer address when validation of a new peer address fails.
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	785 */
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	786
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	787 if (qc->path == path) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	788 /* active path validation failed */
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	789
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	790 bkp = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	791
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	792 if (bkp == NULL) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	793 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	794 qc->error_reason = "no viable path";
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	795 return NGX_ERROR;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	796 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	797
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	798 qc->path = bkp;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	799 qc->path->tag = NGX_QUIC_PATH_ACTIVE;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	800
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	801 ngx_quic_set_connection_path(c, qc->path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	802
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	803 ngx_log_error(NGX_LOG_INFO, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	804 "quic path seq:%uL addr:%V is restored from backup",
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	805 qc->path->seqnum, &qc->path->addr_text);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	806
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	807 ngx_quic_path_dbg(c, "is active", qc->path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	808 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	809
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	810 return ngx_quic_free_path(c, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	811 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	812
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	813
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	814 static ngx_int_t
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	815 ngx_quic_expire_path_mtu_delay(ngx_connection_t c, ngx_quic_path_t path)
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	816 {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	817 ngx_int_t rc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	818 ngx_uint_t i;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	819 ngx_msec_t pto;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	820 ngx_quic_send_ctx_t *ctx;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	821 ngx_quic_connection_t *qc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	822
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	823 qc = ngx_quic_get_connection(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	824 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	825
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	826 path->tries = 0;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	827
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	828 for ( ;; ) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	829
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	830 for (i = 0; i < NGX_QUIC_PATH_RETRIES; i++) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	831 path->mtu_pnum[i] = NGX_QUIC_UNSET_PN;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	832 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	833
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	834 rc = ngx_quic_send_path_mtu_probe(c, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	835
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	836 if (rc == NGX_ERROR) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	837 return NGX_ERROR;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	838 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	839
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	840 if (rc == NGX_OK) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	841 pto = ngx_quic_pto(c, ctx);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	842 path->expires = ngx_current_msec + pto;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	843 path->state = NGX_QUIC_PATH_MTUD;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	844 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	845 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	846
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	847 /* rc == NGX_DECLINED */
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	848
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	849 path->max_mtu = path->mtud;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	850
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	851 if (path->max_mtu - path->mtu <= NGX_QUIC_PATH_MTU_PRECISION) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	852 path->state = NGX_QUIC_PATH_IDLE;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	853 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	854 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	855
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	856 path->mtud = (path->mtu + path->max_mtu) / 2;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	857 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	858 }
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	859
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	860
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	861 static ngx_int_t
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	862 ngx_quic_expire_path_mtu_discovery(ngx_connection_t c, ngx_quic_path_t path)
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	863 {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	864 ngx_int_t rc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	865 ngx_msec_int_t pto;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	866 ngx_quic_send_ctx_t *ctx;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	867 ngx_quic_connection_t *qc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	868
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	869 qc = ngx_quic_get_connection(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	870 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	871
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	872 if (++path->tries < NGX_QUIC_PATH_RETRIES) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	873 rc = ngx_quic_send_path_mtu_probe(c, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	874
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	875 if (rc == NGX_ERROR) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	876 return NGX_ERROR;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	877 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	878
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	879 if (rc == NGX_OK) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	880 pto = ngx_quic_pto(c, ctx) << path->tries;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	881 path->expires = ngx_current_msec + pto;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	882 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	883 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	884
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	885 /* rc == NGX_DECLINED */
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	886 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	887
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	888 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	889 "quic path seq:%uL expired mtu:%uz",
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	890 path->seqnum, path->mtud);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	891
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	892 path->max_mtu = path->mtud;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	893
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	894 ngx_quic_discover_path_mtu(c, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	895
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	896 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	897 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	898
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	899
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	900 static ngx_int_t
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	901 ngx_quic_send_path_mtu_probe(ngx_connection_t c, ngx_quic_path_t path)
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	902 {
9190 3a67dd34b6cc QUIC: fixed anti-amplification with explicit send. Roman Arutyunyan <arut@nginx.com> parents: 9189 diff changeset	903 size_t mtu;
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	904 ngx_int_t rc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	905 ngx_uint_t log_error;
9192 efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	906 ngx_quic_frame_t *frame;
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	907 ngx_quic_send_ctx_t *ctx;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	908 ngx_quic_connection_t *qc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	909
9192 efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	910 frame = ngx_quic_alloc_frame(c);
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	911 if (frame == NULL) {
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	912 return NGX_ERROR;
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	913 }
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	914
9192 efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	915 frame->level = ssl_encryption_application;
efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	916 frame->type = NGX_QUIC_FT_PING;
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	917
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	918 qc = ngx_quic_get_connection(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	919 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	920 path->mtu_pnum[path->tries] = ctx->pnum;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	921
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	922 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	923 "quic path seq:%uL send probe "
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	924 "mtu:%uz pnum:%uL tries:%ui",
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	925 path->seqnum, path->mtud, ctx->pnum, path->tries);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	926
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	927 log_error = c->log_error;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	928 c->log_error = NGX_ERROR_IGNORE_EMSGSIZE;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	929
9190 3a67dd34b6cc QUIC: fixed anti-amplification with explicit send. Roman Arutyunyan <arut@nginx.com> parents: 9189 diff changeset	930 mtu = path->mtu;
3a67dd34b6cc QUIC: fixed anti-amplification with explicit send. Roman Arutyunyan <arut@nginx.com> parents: 9189 diff changeset	931 path->mtu = path->mtud;
3a67dd34b6cc QUIC: fixed anti-amplification with explicit send. Roman Arutyunyan <arut@nginx.com> parents: 9189 diff changeset	932
9192 efcdaa66df2e QUIC: congestion control in ngx_quic_frame_sendto(). Roman Arutyunyan <arut@nginx.com> parents: 9191 diff changeset	933 rc = ngx_quic_frame_sendto(c, frame, path->mtud, path);
9190 3a67dd34b6cc QUIC: fixed anti-amplification with explicit send. Roman Arutyunyan <arut@nginx.com> parents: 9189 diff changeset	934
3a67dd34b6cc QUIC: fixed anti-amplification with explicit send. Roman Arutyunyan <arut@nginx.com> parents: 9189 diff changeset	935 path->mtu = mtu;
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	936 c->log_error = log_error;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	937
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	938 if (rc == NGX_ERROR) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	939 if (c->write->error) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	940 c->write->error = 0;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	941
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	942 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	943 "quic path seq:%uL rejected mtu:%uz",
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	944 path->seqnum, path->mtud);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	945
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	946 return NGX_DECLINED;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	947 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	948
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	949 return NGX_ERROR;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	950 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	951
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	952 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	953 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	954
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	955
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	956 ngx_int_t
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	957 ngx_quic_handle_path_mtu(ngx_connection_t c, ngx_quic_path_t path,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	958 uint64_t min, uint64_t max)
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	959 {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	960 uint64_t pnum;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	961 ngx_uint_t i;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	962
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	963 if (path->state != NGX_QUIC_PATH_MTUD) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	964 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	965 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	966
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	967 for (i = 0; i < NGX_QUIC_PATH_RETRIES; i++) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	968 pnum = path->mtu_pnum[i];
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	969
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	970 if (pnum == NGX_QUIC_UNSET_PN) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	971 break;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	972 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	973
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	974 if (pnum < min \|\| pnum > max) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	975 continue;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	976 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	977
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	978 path->mtu = path->mtud;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	979
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	980 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	981 "quic path seq:%uL ack mtu:%uz",
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	982 path->seqnum, path->mtu);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	983
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	984 ngx_quic_discover_path_mtu(c, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	985
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	986 break;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	987 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	988
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	989 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	990 }

Mercurial > hg > nginx

annotate src/event/quic/ngx_event_quic_migration.c @ 9194:a6f79f044de5