nginx: src/event/quic/ngx_event_quic

annotate src/event/quic/ngx_event_quic_migration.c @ 9147:58afcd72446f

QUIC: path MTU discovery. MTU selection starts by doubling the initial MTU until the first failure. Then binary search is used to find the path MTU.

author	Roman Arutyunyan <arut@nginx.com>
date	Mon, 14 Aug 2023 09:21:27 +0400
parents	f3412ec3b6d1
children	f6b6f3dd7ca0

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 {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	39 ngx_quic_frame_t frame, *fp;
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	40 ngx_quic_connection_t *qc;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	41
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	42 qc = ngx_quic_get_connection(c);
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	43
8933 02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8932 diff changeset	44 ngx_memzero(&frame, sizeof(ngx_quic_frame_t));
02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8932 diff changeset	45
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	46 frame.level = ssl_encryption_application;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	47 frame.type = NGX_QUIC_FT_PATH_RESPONSE;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	48 frame.u.path_response = *f;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	49
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	50 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	51 * RFC 9000, 8.2.2. Path Validation Responses
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	52 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	53 * 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	54 * PATH_CHALLENGE frame was received.
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	55 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	56
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	57 /*
8901 a951e0809044 QUIC: fixed PATH_RESPONSE frame expansion. Vladimir Homutov <vl@nginx.com> parents: 8822 diff changeset	58 * 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	59 * to at least the smallest allowed maximum datagram size of 1200 bytes.
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	60 */
9146 f3412ec3b6d1 QUIC: allowed ngx_quic_frame_sendto() to return NGX_AGAIN. Roman Arutyunyan <arut@nginx.com> parents: 9144 diff changeset	61 if (ngx_quic_frame_sendto(c, &frame, 1200, pkt->path) == NGX_ERROR) {
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	62 return NGX_ERROR;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	63 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	64
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	65 if (pkt->path == qc->path) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	66 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	67 * RFC 9000, 9.3.3. Off-Path Packet Forwarding
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	68 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	69 * 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	70 * send a non-probing packet in response.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	71 */
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	72
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	73 fp = ngx_quic_alloc_frame(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	74 if (fp == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	75 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	76 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	77
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	78 fp->level = ssl_encryption_application;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	79 fp->type = NGX_QUIC_FT_PING;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	80
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	81 ngx_quic_queue_frame(qc, fp);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	82 }
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	83
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	84 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	85 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	86
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	87
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	88 ngx_int_t
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	89 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	90 ngx_quic_path_challenge_frame_t *f)
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	91 {
8943 118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	92 ngx_uint_t rst;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	93 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	94 ngx_quic_path_t path, prev;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	95 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	96
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	97 qc = ngx_quic_get_connection(c);
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 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	100 * RFC 9000, 8.2.3. Successful Path Validation
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	101 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	102 * 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	103 * on which the PATH_CHALLENGE was sent.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	104 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	105
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	106 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	107 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	108 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	109 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	110 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	111
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	112 if (path->state != NGX_QUIC_PATH_VALIDATING) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	113 continue;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	116 if (ngx_memcmp(path->challenge1, f->data, sizeof(f->data)) == 0
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	117 \|\| ngx_memcmp(path->challenge2, f->data, sizeof(f->data)) == 0)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	118 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	119 goto valid;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	120 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	121 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	122
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	123 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
9015 a2fbae359828 QUIC: fixed indentation. Sergey Kandaurov <pluknet@nginx.com> parents: 8997 diff changeset	124 "quic stale PATH_RESPONSE ignored");
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	125
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	126 return NGX_OK;
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 valid:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	129
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	130 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	131 * RFC 9000, 9.4. Loss Detection and Congestion Control
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	132 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	133 * On confirming a peer's ownership of its new address,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	134 * an endpoint MUST immediately reset the congestion controller
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	135 * 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	136 * 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	137 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	138
8943 118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	139 rst = 1;
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	140
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	141 prev = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	142
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	143 if (prev != NULL) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	144
8943 118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	145 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	146 path->sockaddr, path->socklen, 0)
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	147 == NGX_OK)
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	148 {
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	149 /* address did not change */
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	150 rst = 0;
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	151
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	152 path->mtu = prev->mtu;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	153 path->max_mtu = prev->max_mtu;
8943 118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	154 }
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	155 }
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	156
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8940 diff changeset	157 if (rst) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	158 ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	159
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	160 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	161 ngx_max(2 * qc->tp.max_udp_payload_size,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	162 14720));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	163 qc->congestion.ssthresh = (size_t) -1;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	164 qc->congestion.recovery_start = ngx_current_msec;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	165 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	166
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	167 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	168 * RFC 9000, 9.3. Responding to Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	169 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	170 * After verifying a new client address, the server SHOULD
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	171 * send new address validation tokens (Section 8) to the client.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	172 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	173
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	174 if (ngx_quic_send_new_token(c, path) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	175 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	176 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	177
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	178 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	179 "quic path seq:%uL addr:%V successfully validated",
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	180 path->seqnum, &path->addr_text);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	181
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	182 ngx_quic_path_dbg(c, "is validated", path);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	183
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	184 path->validated = 1;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	185
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	186 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	187
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	188 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	189 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	190
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	191
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	192 ngx_quic_path_t *
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	193 ngx_quic_new_path(ngx_connection_t *c,
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	194 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	195 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	196 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	197 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	198 ngx_quic_connection_t *qc;
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 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	201
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	202 if (!ngx_queue_empty(&qc->free_paths)) {
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 q = ngx_queue_head(&qc->free_paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	205 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	206
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	207 ngx_queue_remove(&path->queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	208
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	209 ngx_memzero(path, sizeof(ngx_quic_path_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	210
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	211 } else {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	212
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	213 path = ngx_pcalloc(c->pool, sizeof(ngx_quic_path_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	214 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	215 return NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	216 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	217 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	218
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	219 ngx_queue_insert_tail(&qc->paths, &path->queue);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	220
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	221 path->cid = cid;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	222 cid->used = 1;
8763 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 path->seqnum = qc->path_seqnum++;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	225
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	226 path->sockaddr = &path->sa.sockaddr;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	227 path->socklen = socklen;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	228 ngx_memcpy(path->sockaddr, sockaddr, socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	229
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	230 path->addr_text.data = path->text;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	231 path->addr_text.len = ngx_sock_ntop(sockaddr, socklen, path->text,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	232 NGX_SOCKADDR_STRLEN, 1);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	233
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	234 path->mtu = NGX_QUIC_MIN_INITIAL_SIZE;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	235
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	236 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	237 "quic path seq:%uL created addr:%V",
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	238 path->seqnum, &path->addr_text);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	239 return path;
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 static ngx_quic_path_t *
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	244 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	245 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	246 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	247 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	248 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	249
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	250 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	251
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	252 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	253 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	254 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	255 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	256 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	257
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	258 if (path->tag == tag) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	259 return path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	260 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	261 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	262
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	263 return NULL;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	267 ngx_int_t
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	268 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	269 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	270 off_t len;
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	271 ngx_queue_t *q;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	272 ngx_quic_path_t path, probe;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	273 ngx_quic_socket_t *qsock;
8972 077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	274 ngx_quic_send_ctx_t *ctx;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	275 ngx_quic_client_id_t *cid;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	276 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	277
8939 ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	278 qc = ngx_quic_get_connection(c);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	279 qsock = ngx_quic_get_socket(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	280
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	281 len = pkt->raw->last - pkt->raw->start;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	282
9017 c2f5d79cde64 QUIC: separate UDP framework for QUIC. Roman Arutyunyan <arut@nginx.com> parents: 9015 diff changeset	283 if (c->udp->buffer == NULL) {
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	284 /* first ever packet in connection, path already exists */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	285 path = qc->path;
8913 40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	286 goto update;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	287 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	288
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	289 probe = NULL;
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	290
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	291 for (q = ngx_queue_head(&qc->paths);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	292 q != ngx_queue_sentinel(&qc->paths);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	293 q = ngx_queue_next(q))
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	294 {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	295 path = ngx_queue_data(q, ngx_quic_path_t, queue);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	296
9017 c2f5d79cde64 QUIC: separate UDP framework for QUIC. Roman Arutyunyan <arut@nginx.com> parents: 9015 diff changeset	297 if (ngx_cmp_sockaddr(&qsock->sockaddr.sockaddr, qsock->socklen,
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	298 path->sockaddr, path->socklen, 1)
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	299 == NGX_OK)
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	300 {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	301 goto update;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	302 }
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	303
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	304 if (path->tag == NGX_QUIC_PATH_PROBE) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	305 probe = path;
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	306 }
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	307 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	308
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	309 /* packet from new path, drop current probe, if any */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	310
8972 077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	311 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	312
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	313 /*
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	314 * only accept highest-numbered packets to prevent connection id
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	315 * exhaustion by excessive probing packets from unknown paths
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	316 */
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	317 if (pkt->pn != ctx->largest_pn) {
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	318 return NGX_DONE;
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	319 }
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8971 diff changeset	320
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	321 if (probe && ngx_quic_free_path(c, probe) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	322 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	323 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	324
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	325 /* new path requires new client id */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	326 cid = ngx_quic_next_client_id(c);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	327 if (cid == NULL) {
9029 28fc35b71d75 QUIC: "info" logging level on insufficient client connection ids. Sergey Kandaurov <pluknet@nginx.com> parents: 9017 diff changeset	328 ngx_log_error(NGX_LOG_INFO, c->log, 0,
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	329 "quic no available client ids for new path");
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	330 /* stop processing of this datagram */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	331 return NGX_DONE;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	332 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	333
9017 c2f5d79cde64 QUIC: separate UDP framework for QUIC. Roman Arutyunyan <arut@nginx.com> parents: 9015 diff changeset	334 path = ngx_quic_new_path(c, &qsock->sockaddr.sockaddr, qsock->socklen, cid);
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	335 if (path == NULL) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	336 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	337 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	338
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	339 path->tag = NGX_QUIC_PATH_PROBE;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	340
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	341 /*
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	342 * client arrived using new path and previously seen DCID,
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	343 * this indicates NAT rebinding (or bad client)
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	344 */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	345 if (qsock->used) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	346 pkt->rebound = 1;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	347 }
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	348
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	349 update:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	350
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	351 qsock->used = 1;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	352 pkt->path = path;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	353
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	354 /* TODO: this may be too late in some cases;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	355 * for example, if error happens during decrypt(), we cannot
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	356 * send CC, if error happens in 1st packet, due to amplification
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	357 * limit, because path->received = 0
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	358 *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	359 * should we account garbage as received or only decrypting packets?
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	360 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	361 path->received += len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	362
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	363 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	364 "quic packet len:%O via sock seq:%L path seq:%uL",
8985 da24a78720eb QUIC: fixed handling of initial source connection id. Vladimir Homutov <vl@nginx.com> parents: 8972 diff changeset	365 len, (int64_t) qsock->sid.seqnum, path->seqnum);
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	366 ngx_quic_path_dbg(c, "status", path);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	367
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	368 return NGX_OK;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	369 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	370
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	371
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	372 ngx_int_t
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	373 ngx_quic_free_path(ngx_connection_t c, ngx_quic_path_t path)
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	374 {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	375 ngx_quic_connection_t *qc;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	376
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	377 qc = ngx_quic_get_connection(c);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	378
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	379 ngx_queue_remove(&path->queue);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	380 ngx_queue_insert_head(&qc->free_paths, &path->queue);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	381
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	382 /*
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	383 * invalidate CID that is no longer usable for any other path;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	384 * this also requests new CIDs from client
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	385 */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	386 if (path->cid) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	387 if (ngx_quic_free_client_id(c, path->cid) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	388 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	389 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	390 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	391
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	392 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	393 "quic path seq:%uL addr:%V retired",
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	394 path->seqnum, &path->addr_text);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	395
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	396 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	397 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	398
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	399
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	400 static void
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	401 ngx_quic_set_connection_path(ngx_connection_t c, ngx_quic_path_t path)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	402 {
9015 a2fbae359828 QUIC: fixed indentation. Sergey Kandaurov <pluknet@nginx.com> parents: 8997 diff changeset	403 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	404 c->socklen = path->socklen;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	405
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	406 if (c->addr_text.data) {
9099 9462c514a653 QUIC: fixed addr_text after migration (ticket #2488). Roman Arutyunyan <arut@nginx.com> parents: 9098 diff changeset	407 c->addr_text.len = ngx_sock_ntop(c->sockaddr, c->socklen,
9462c514a653 QUIC: fixed addr_text after migration (ticket #2488). Roman Arutyunyan <arut@nginx.com> parents: 9098 diff changeset	408 c->addr_text.data,
9462c514a653 QUIC: fixed addr_text after migration (ticket #2488). Roman Arutyunyan <arut@nginx.com> parents: 9098 diff changeset	409 c->listening->addr_text_max_len, 0);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	410 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	411
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	412 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	413 "quic send path set to seq:%uL addr:%V",
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	414 path->seqnum, &path->addr_text);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	415 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	416
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	417
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	418 ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	419 ngx_quic_handle_migration(ngx_connection_t c, ngx_quic_header_t pkt)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	420 {
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	421 ngx_quic_path_t next, bkp;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	422 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	423 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	424
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	425 /* got non-probing packet via non-active path */
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	426
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	427 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	428
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	429 ctx = ngx_quic_get_send_ctx(qc, pkt->level);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	430
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	431 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	432 * RFC 9000, 9.3. Responding to Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	433 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	434 * An endpoint only changes the address to which it sends packets in
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	435 * response to the highest-numbered non-probing packet.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	436 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	437 if (pkt->pn != ctx->largest_pn) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	438 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	439 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	440
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	441 next = pkt->path;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	442
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	443 /*
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	444 * RFC 9000, 9.3.3:
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	445 *
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	446 * In response to an apparent migration, endpoints MUST validate the
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	447 * previously active path using a PATH_CHALLENGE frame.
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	448 */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	449 if (pkt->rebound) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	450
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	451 /* NAT rebinding: client uses new path with old SID */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	452 if (ngx_quic_validate_path(c, qc->path) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	453 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	454 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	455 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	456
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	457 if (qc->path->validated) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	458
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	459 if (next->tag != NGX_QUIC_PATH_BACKUP) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	460 /* can delete backup path, if any */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	461 bkp = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	462
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	463 if (bkp && ngx_quic_free_path(c, bkp) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	464 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	465 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	466 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	467
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	468 qc->path->tag = NGX_QUIC_PATH_BACKUP;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	469 ngx_quic_path_dbg(c, "is now backup", qc->path);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	470
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	471 } else {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	472 if (ngx_quic_free_path(c, qc->path) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	473 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	474 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	475 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	476
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	477 /* switch active path to migrated */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	478 qc->path = next;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	479 qc->path->tag = NGX_QUIC_PATH_ACTIVE;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	480
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	481 ngx_quic_set_connection_path(c, next);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	482
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	483 if (!next->validated && next->state != NGX_QUIC_PATH_VALIDATING) {
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	484 if (ngx_quic_validate_path(c, next) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	485 return NGX_ERROR;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	486 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	487 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	488
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	489 ngx_log_error(NGX_LOG_INFO, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	490 "quic migrated to path seq:%uL addr:%V",
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	491 qc->path->seqnum, &qc->path->addr_text);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	492
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	493 ngx_quic_path_dbg(c, "is now active", qc->path);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	494
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	495 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	496 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	497
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	498
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	499 static ngx_int_t
8944 b7284807b4fa QUIC: refactored ngx_quic_validate_path(). Vladimir Homutov <vl@nginx.com> parents: 8943 diff changeset	500 ngx_quic_validate_path(ngx_connection_t c, ngx_quic_path_t path)
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	501 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	502 ngx_msec_t pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	503 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	504 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	505
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	506 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	507
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	508 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	509 "quic initiated validation of path seq:%uL", path->seqnum);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	510
9096 c6db94ec3841 QUIC: separated path validation retransmit backoff. Sergey Kandaurov <pluknet@nginx.com> parents: 9029 diff changeset	511 path->tries = 0;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	512
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	513 if (RAND_bytes(path->challenge1, 8) != 1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	514 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	515 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	516
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	517 if (RAND_bytes(path->challenge2, 8) != 1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	518 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	519 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	520
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	521 if (ngx_quic_send_path_challenge(c, path) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	522 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	523 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	524
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	525 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
9097 a9fef6ca45a8 QUIC: lower bound path validation PTO. Sergey Kandaurov <pluknet@nginx.com> parents: 9096 diff changeset	526 pto = ngx_max(ngx_quic_pto(c, ctx), 1000);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	527
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	528 path->expires = ngx_current_msec + pto;
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	529 path->state = NGX_QUIC_PATH_VALIDATING;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	530
9098 d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	531 ngx_quic_set_path_timer(c);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	532
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	533 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	534 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	535
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	536
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	537 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	538 ngx_quic_send_path_challenge(ngx_connection_t c, ngx_quic_path_t path)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	539 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	540 ngx_quic_frame_t frame;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	541
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	542 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
8997 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8985 diff changeset	543 "quic path seq:%uL send path_challenge tries:%ui",
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	544 path->seqnum, path->tries);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	545
8933 02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8932 diff changeset	546 ngx_memzero(&frame, sizeof(ngx_quic_frame_t));
02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8932 diff changeset	547
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	548 frame.level = ssl_encryption_application;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	549 frame.type = NGX_QUIC_FT_PATH_CHALLENGE;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	550
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	551 ngx_memcpy(frame.u.path_challenge.data, path->challenge1, 8);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	552
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	553 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	554 * RFC 9000, 8.2.1. Initiating Path Validation
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	555 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	556 * An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	557 * to at least the smallest allowed maximum datagram size of 1200 bytes,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	558 * unless the anti-amplification limit for the path does not permit
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	559 * sending a datagram of this size.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	560 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	561
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	562 /* same applies to PATH_RESPONSE frames */
9146 f3412ec3b6d1 QUIC: allowed ngx_quic_frame_sendto() to return NGX_AGAIN. Roman Arutyunyan <arut@nginx.com> parents: 9144 diff changeset	563 if (ngx_quic_frame_sendto(c, &frame, 1200, path) == NGX_ERROR) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	564 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	565 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	566
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	567 ngx_memcpy(frame.u.path_challenge.data, path->challenge2, 8);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	568
9146 f3412ec3b6d1 QUIC: allowed ngx_quic_frame_sendto() to return NGX_AGAIN. Roman Arutyunyan <arut@nginx.com> parents: 9144 diff changeset	569 if (ngx_quic_frame_sendto(c, &frame, 1200, path) == NGX_ERROR) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	570 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	571 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	572
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	573 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	574 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	575
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	576
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	577 void
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	578 ngx_quic_discover_path_mtu(ngx_connection_t c, ngx_quic_path_t path)
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	579 {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	580 ngx_quic_connection_t *qc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	581
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	582 qc = ngx_quic_get_connection(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	583
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	584 if (path->max_mtu) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	585 if (path->max_mtu - path->mtu <= NGX_QUIC_PATH_MTU_PRECISION) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	586 path->state = NGX_QUIC_PATH_IDLE;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	587 ngx_quic_set_path_timer(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	588 return;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	589 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	590
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	591 path->mtud = (path->mtu + path->max_mtu) / 2;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	592
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	593 } else {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	594 path->mtud = path->mtu * 2;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	595
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	596 if (path->mtud >= qc->ctp.max_udp_payload_size) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	597 path->mtud = qc->ctp.max_udp_payload_size;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	598 path->max_mtu = qc->ctp.max_udp_payload_size;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	599 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	600 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	601
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	602 path->state = NGX_QUIC_PATH_WAITING;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	603 path->expires = ngx_current_msec + NGX_QUIC_PATH_MTU_DELAY;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	604
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	605 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	606 "quic path seq:%uL schedule mtu:%uz",
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	607 path->seqnum, path->mtud);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	608
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	609 ngx_quic_set_path_timer(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	610 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	611
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	612
9098 d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	613 static void
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	614 ngx_quic_set_path_timer(ngx_connection_t *c)
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	615 {
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	616 ngx_msec_t now;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	617 ngx_queue_t *q;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	618 ngx_msec_int_t left, next;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	619 ngx_quic_path_t *path;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	620 ngx_quic_connection_t *qc;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	621
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	622 qc = ngx_quic_get_connection(c);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	623
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	624 now = ngx_current_msec;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	625 next = -1;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	626
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	627 for (q = ngx_queue_head(&qc->paths);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	628 q != ngx_queue_sentinel(&qc->paths);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	629 q = ngx_queue_next(q))
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	630 {
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	631 path = ngx_queue_data(q, ngx_quic_path_t, queue);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	632
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	633 if (path->state == NGX_QUIC_PATH_IDLE) {
9098 d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	634 continue;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	635 }
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	636
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	637 left = path->expires - now;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	638 left = ngx_max(left, 1);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	639
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	640 if (next == -1 \|\| left < next) {
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	641 next = left;
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	642 }
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	643 }
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	644
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	645 if (next != -1) {
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	646 ngx_add_timer(&qc->path_validation, next);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	647
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	648 } else if (qc->path_validation.timer_set) {
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	649 ngx_del_timer(&qc->path_validation);
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	650 }
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	651 }
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	652
d565cf69ff5d QUIC: reschedule path validation on path insertion/removal. Sergey Kandaurov <pluknet@nginx.com> parents: 9097 diff changeset	653
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	654 void
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	655 ngx_quic_path_handler(ngx_event_t *ev)
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	656 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	657 ngx_msec_t now;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	658 ngx_queue_t *q;
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	659 ngx_msec_int_t left;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	660 ngx_quic_path_t *path;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	661 ngx_connection_t *c;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	662 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	663
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	664 c = ev->data;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	665 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	666
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	667 now = ngx_current_msec;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	668
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	669 q = ngx_queue_head(&qc->paths);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	670
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	671 while (q != ngx_queue_sentinel(&qc->paths)) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	672
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	673 path = ngx_queue_data(q, ngx_quic_path_t, queue);
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	674 q = ngx_queue_next(q);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	675
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	676 if (path->state == NGX_QUIC_PATH_IDLE) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	677 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	678 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	679
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	680 left = path->expires - now;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	681
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	682 if (left > 0) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	683 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	684 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	685
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	686 switch (path->state) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	687 case NGX_QUIC_PATH_VALIDATING:
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	688 if (ngx_quic_expire_path_validation(c, path) != NGX_OK) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	689 goto failed;
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	690 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	691
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	692 break;
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	693
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	694 case NGX_QUIC_PATH_WAITING:
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	695 if (ngx_quic_expire_path_mtu_delay(c, path) != NGX_OK) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	696 goto failed;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	697 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	698
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	699 break;
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	700
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	701 case NGX_QUIC_PATH_MTUD:
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	702 if (ngx_quic_expire_path_mtu_discovery(c, path) != NGX_OK) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	703 goto failed;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	704 }
8971 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8944 diff changeset	705
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	706 break;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	707
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	708 default:
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	709 break;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	710 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	711 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	712
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	713 ngx_quic_set_path_timer(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	714
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	715 return;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	716
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	717 failed:
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	718
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	719 ngx_quic_close_connection(c, NGX_ERROR);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	720 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	721
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	722
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	723 static ngx_int_t
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	724 ngx_quic_expire_path_validation(ngx_connection_t c, ngx_quic_path_t path)
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	725 {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	726 ngx_msec_int_t pto;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	727 ngx_quic_path_t *bkp;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	728 ngx_quic_send_ctx_t *ctx;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	729 ngx_quic_connection_t *qc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	730
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	731 qc = ngx_quic_get_connection(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	732 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	733
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	734 if (++path->tries < NGX_QUIC_PATH_RETRIES) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	735 pto = ngx_max(ngx_quic_pto(c, ctx), 1000) << path->tries;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	736 path->expires = ngx_current_msec + pto;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	737
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	738 (void) ngx_quic_send_path_challenge(c, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	739
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	740 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	741 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	742
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	743 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	744 "quic path seq:%uL validation failed", path->seqnum);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	745
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	746 /* found expired path */
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	747
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	748 path->validated = 0;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	749
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	750
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	751 /* RFC 9000, 9.3.2. On-Path Address Spoofing
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	752 *
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	753 * To protect the connection from failing due to such a spurious
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	754 * migration, an endpoint MUST revert to using the last validated
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	755 * peer address when validation of a new peer address fails.
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	756 */
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	757
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	758 if (qc->path == path) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	759 /* active path validation failed */
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	760
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	761 bkp = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	762
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	763 if (bkp == NULL) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	764 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	765 qc->error_reason = "no viable path";
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	766 return NGX_ERROR;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	767 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	768
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	769 qc->path = bkp;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	770 qc->path->tag = NGX_QUIC_PATH_ACTIVE;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	771
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	772 ngx_quic_set_connection_path(c, qc->path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	773
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	774 ngx_log_error(NGX_LOG_INFO, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	775 "quic path seq:%uL addr:%V is restored from backup",
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	776 qc->path->seqnum, &qc->path->addr_text);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	777
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	778 ngx_quic_path_dbg(c, "is active", qc->path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	779 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	780
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	781 return ngx_quic_free_path(c, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	782 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	783
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	784
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	785 static ngx_int_t
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	786 ngx_quic_expire_path_mtu_delay(ngx_connection_t c, ngx_quic_path_t path)
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	787 {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	788 ngx_int_t rc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	789 ngx_uint_t i;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	790 ngx_msec_t pto;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	791 ngx_quic_send_ctx_t *ctx;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	792 ngx_quic_connection_t *qc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	793
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	794 qc = ngx_quic_get_connection(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	795 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	796
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	797 path->tries = 0;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	798
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	799 for ( ;; ) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	800
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	801 for (i = 0; i < NGX_QUIC_PATH_RETRIES; i++) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	802 path->mtu_pnum[i] = NGX_QUIC_UNSET_PN;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	803 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	804
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	805 rc = ngx_quic_send_path_mtu_probe(c, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	806
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	807 if (rc == NGX_ERROR) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	808 return NGX_ERROR;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	809 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	810
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	811 if (rc == NGX_OK) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	812 pto = ngx_quic_pto(c, ctx);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	813 path->expires = ngx_current_msec + pto;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	814 path->state = NGX_QUIC_PATH_MTUD;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	815 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	816 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	817
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	818 /* rc == NGX_DECLINED */
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	819
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	820 path->max_mtu = path->mtud;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	821
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	822 if (path->max_mtu - path->mtu <= NGX_QUIC_PATH_MTU_PRECISION) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	823 path->state = NGX_QUIC_PATH_IDLE;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	824 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	825 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	826
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	827 path->mtud = (path->mtu + path->max_mtu) / 2;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	828 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	829 }
9147 58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	830
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	831
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	832 static ngx_int_t
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	833 ngx_quic_expire_path_mtu_discovery(ngx_connection_t c, ngx_quic_path_t path)
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	834 {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	835 ngx_int_t rc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	836 ngx_msec_int_t pto;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	837 ngx_quic_send_ctx_t *ctx;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	838 ngx_quic_connection_t *qc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	839
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	840 qc = ngx_quic_get_connection(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	841 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	842
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	843 if (++path->tries < NGX_QUIC_PATH_RETRIES) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	844 rc = ngx_quic_send_path_mtu_probe(c, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	845
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	846 if (rc == NGX_ERROR) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	847 return NGX_ERROR;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	848 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	849
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	850 if (rc == NGX_OK) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	851 pto = ngx_quic_pto(c, ctx) << path->tries;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	852 path->expires = ngx_current_msec + pto;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	853 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	854 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	855
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	856 /* rc == NGX_DECLINED */
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	857 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	858
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	859 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	860 "quic path seq:%uL expired mtu:%uz",
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	861 path->seqnum, path->mtud);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	862
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	863 path->max_mtu = path->mtud;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	864
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	865 ngx_quic_discover_path_mtu(c, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	866
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	867 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	868 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	869
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	870
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	871 static ngx_int_t
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	872 ngx_quic_send_path_mtu_probe(ngx_connection_t c, ngx_quic_path_t path)
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	873 {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	874 ngx_int_t rc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	875 ngx_uint_t log_error;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	876 ngx_quic_frame_t frame;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	877 ngx_quic_send_ctx_t *ctx;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	878 ngx_quic_connection_t *qc;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	879
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	880 ngx_memzero(&frame, sizeof(ngx_quic_frame_t));
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	881
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	882 frame.level = ssl_encryption_application;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	883 frame.type = NGX_QUIC_FT_PING;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	884
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	885 qc = ngx_quic_get_connection(c);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	886 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	887 path->mtu_pnum[path->tries] = ctx->pnum;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	888
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	889 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	890 "quic path seq:%uL send probe "
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	891 "mtu:%uz pnum:%uL tries:%ui",
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	892 path->seqnum, path->mtud, ctx->pnum, path->tries);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	893
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	894 log_error = c->log_error;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	895 c->log_error = NGX_ERROR_IGNORE_EMSGSIZE;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	896
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	897 rc = ngx_quic_frame_sendto(c, &frame, path->mtud, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	898 c->log_error = log_error;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	899
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	900 if (rc == NGX_ERROR) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	901 if (c->write->error) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	902 c->write->error = 0;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	903
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	904 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	905 "quic path seq:%uL rejected mtu:%uz",
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	906 path->seqnum, path->mtud);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	907
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	908 return NGX_DECLINED;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	909 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	910
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	911 return NGX_ERROR;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	912 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	913
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	914 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	915 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	916
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	917
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	918 ngx_int_t
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	919 ngx_quic_handle_path_mtu(ngx_connection_t c, ngx_quic_path_t path,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	920 uint64_t min, uint64_t max)
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	921 {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	922 uint64_t pnum;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	923 ngx_uint_t i;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	924
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	925 if (path->state != NGX_QUIC_PATH_MTUD) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	926 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	927 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	928
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	929 for (i = 0; i < NGX_QUIC_PATH_RETRIES; i++) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	930 pnum = path->mtu_pnum[i];
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	931
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	932 if (pnum == NGX_QUIC_UNSET_PN) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	933 break;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	934 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	935
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	936 if (pnum < min \|\| pnum > max) {
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	937 continue;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	938 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	939
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	940 path->mtu = path->mtud;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	941
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	942 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	943 "quic path seq:%uL ack mtu:%uz",
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	944 path->seqnum, path->mtu);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	945
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	946 ngx_quic_discover_path_mtu(c, path);
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	947
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	948 break;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	949 }
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	950
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	951 return NGX_OK;
58afcd72446f QUIC: path MTU discovery. Roman Arutyunyan <arut@nginx.com> parents: 9146 diff changeset	952 }

Mercurial > hg > nginx

annotate src/event/quic/ngx_event_quic_migration.c @ 9147:58afcd72446f