nginx: src/event/quic/ngx_event_quic

annotate src/event/quic/ngx_event_quic_migration.c @ 9153:8f7e6d8c061e

QUIC: use last client dcid to receive initial packets. Previously, original dcid was used to receive initial client packets in case server initial response was lost. However, last dcid should be used instead. These two are the same unless retry is used. In case of retry, client resends initial packet with a new dcid, that is different from the original dcid. If server response is lost, the client resends this packet again with the same dcid. This is shown in RFC 9000, 7.3. Authenticating Connection IDs, Figure 8. The issue manifested itself with creating multiple server sessions in response to each post-retry client initial packet, if server response is lost.

author	Roman Arutyunyan <arut@nginx.com>
date	Wed, 30 Aug 2023 11:09:21 +0400
parents	58afcd72446f
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 @ 9153:8f7e6d8c061e