nginx-quic: src/event/quic/ngx_event_quic

annotate src/event/quic/ngx_event_quic_migration.c @ 9082:c6db94ec3841 quic

QUIC: separated path validation retransmit backoff. Path validation packets containing PATH_CHALLENGE frames are sent separately from regular frame queue, because of the need to use a decicated path and pad the packets. The packets are sent periodically, separately from the regular probe/lost detection mechanism. A path validation packet is resent up to 3 times, each time after PTO expiration, with increasing per-path PTO backoff.

author	Sergey Kandaurov <pluknet@nginx.com>
date	Tue, 09 May 2023 19:42:39 +0400
parents	28fc35b71d75
children	a9fef6ca45a8

rev	line source
8387 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
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	13 static void ngx_quic_set_connection_path(ngx_connection_t *c,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	14 ngx_quic_path_t *path);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	15 static ngx_int_t ngx_quic_validate_path(ngx_connection_t *c,
8757 b7284807b4fa QUIC: refactored ngx_quic_validate_path(). Vladimir Homutov <vl@nginx.com> parents: 8756 diff changeset	16 ngx_quic_path_t *path);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	17 static ngx_int_t ngx_quic_send_path_challenge(ngx_connection_t *c,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	18 ngx_quic_path_t *path);
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	19 static ngx_quic_path_t ngx_quic_get_path(ngx_connection_t c, ngx_uint_t tag);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	20
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	21
8387 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	22 ngx_int_t
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	23 ngx_quic_handle_path_challenge_frame(ngx_connection_t *c,
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	24 ngx_quic_header_t pkt, ngx_quic_path_challenge_frame_t f)
8387 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	25 {
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	26 ngx_quic_frame_t frame, *fp;
8387 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	27 ngx_quic_connection_t *qc;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	28
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	29 qc = ngx_quic_get_connection(c);
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	30
8722 02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8721 diff changeset	31 ngx_memzero(&frame, sizeof(ngx_quic_frame_t));
02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8721 diff changeset	32
8438 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8437 diff changeset	33 frame.level = ssl_encryption_application;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	34 frame.type = NGX_QUIC_FT_PATH_RESPONSE;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	35 frame.u.path_response = *f;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	36
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	37 /*
8498 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	38 * RFC 9000, 8.2.2. Path Validation Responses
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	39 *
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	40 * A PATH_RESPONSE frame MUST be sent on the network path where the
8498 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	41 * PATH_CHALLENGE frame was received.
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	42 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	43
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	44 /*
8690 a951e0809044 QUIC: fixed PATH_RESPONSE frame expansion. Vladimir Homutov <vl@nginx.com> parents: 8547 diff changeset	45 * An endpoint MUST expand datagrams that contain a PATH_RESPONSE frame
a951e0809044 QUIC: fixed PATH_RESPONSE frame expansion. Vladimir Homutov <vl@nginx.com> parents: 8547 diff changeset	46 * to at least the smallest allowed maximum datagram size of 1200 bytes.
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	47 */
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	48 if (ngx_quic_frame_sendto(c, &frame, 1200, pkt->path) != NGX_OK) {
8387 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	49 return NGX_ERROR;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	50 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	51
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	52 if (pkt->path == qc->path) {
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	53 /*
8498 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	54 * RFC 9000, 9.3.3. Off-Path Packet Forwarding
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	55 *
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	56 * An endpoint that receives a PATH_CHALLENGE on an active path SHOULD
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	57 * send a non-probing packet in response.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	58 */
8387 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	59
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	60 fp = ngx_quic_alloc_frame(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	61 if (fp == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	62 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	63 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	64
8438 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8437 diff changeset	65 fp->level = ssl_encryption_application;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	66 fp->type = NGX_QUIC_FT_PING;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	67
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	68 ngx_quic_queue_frame(qc, fp);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	69 }
8387 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	70
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	71 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	72 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	73
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	74
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	75 ngx_int_t
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	76 ngx_quic_handle_path_response_frame(ngx_connection_t *c,
8438 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8437 diff changeset	77 ngx_quic_path_challenge_frame_t *f)
8387 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	78 {
8756 118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	79 ngx_uint_t rst;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	80 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	81 ngx_quic_path_t path, prev;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	82 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	83
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	84 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	85
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	86 /*
8498 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	87 * RFC 9000, 8.2.3. Successful Path Validation
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	88 *
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	89 * A PATH_RESPONSE frame received on any network path validates the path
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	90 * on which the PATH_CHALLENGE was sent.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	91 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	92
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	93 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	94 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	95 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	96 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	97 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	98
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	99 if (!path->validating) {
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	100 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	101 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	102
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	103 if (ngx_memcmp(path->challenge1, f->data, sizeof(f->data)) == 0
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	104 \|\| ngx_memcmp(path->challenge2, f->data, sizeof(f->data)) == 0)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	105 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	106 goto valid;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	107 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	108 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	109
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	110 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
8860 a2fbae359828 QUIC: fixed indentation. Sergey Kandaurov <pluknet@nginx.com> parents: 8832 diff changeset	111 "quic stale PATH_RESPONSE ignored");
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	112
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	113 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	114
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	115 valid:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	116
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	117 /*
8498 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	118 * RFC 9000, 9.4. Loss Detection and Congestion Control
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	119 *
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	120 * On confirming a peer's ownership of its new address,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	121 * an endpoint MUST immediately reset the congestion controller
8498 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	122 * and round-trip time estimator for the new path to initial values
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	123 * unless the only change in the peer's address is its port number.
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	124 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	125
8756 118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	126 rst = 1;
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	127
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	128 prev = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	129
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	130 if (prev != NULL) {
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	131
8756 118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	132 if (ngx_cmp_sockaddr(prev->sockaddr, prev->socklen,
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	133 path->sockaddr, path->socklen, 0)
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	134 == NGX_OK)
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	135 {
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	136 /* address did not change */
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	137 rst = 0;
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	138 }
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	139 }
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	140
118a34e32121 QUIC: added missing check for backup path existence. Vladimir Homutov <vl@nginx.com> parents: 8729 diff changeset	141 if (rst) {
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	142 ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	143
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	144 qc->congestion.window = ngx_min(10 * qc->tp.max_udp_payload_size,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	145 ngx_max(2 * qc->tp.max_udp_payload_size,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	146 14720));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	147 qc->congestion.ssthresh = (size_t) -1;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	148 qc->congestion.recovery_start = ngx_current_msec;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	149 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	150
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	151 /*
8498 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	152 * RFC 9000, 9.3. Responding to Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	153 *
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	154 * After verifying a new client address, the server SHOULD
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	155 * send new address validation tokens (Section 8) to the client.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	156 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	157
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	158 if (ngx_quic_send_new_token(c, path) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	159 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	160 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	161
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	162 ngx_log_error(NGX_LOG_INFO, c->log, 0,
8832 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8820 diff changeset	163 "quic path seq:%uL addr:%V successfully validated",
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	164 path->seqnum, &path->addr_text);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	165
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	166 ngx_quic_path_dbg(c, "is validated", path);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	167
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	168 path->validated = 1;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	169 path->validating = 0;
8729 fb41e37ddeb0 QUIC: decoupled path state and limitation status. Vladimir Homutov <vl@nginx.com> parents: 8728 diff changeset	170 path->limited = 0;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	171
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	172 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	173 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	174
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	175
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	176 ngx_quic_path_t *
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	177 ngx_quic_new_path(ngx_connection_t *c,
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	178 struct sockaddr sockaddr, socklen_t socklen, ngx_quic_client_id_t cid)
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	179 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	180 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	181 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	182 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	183
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	184 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	185
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	186 if (!ngx_queue_empty(&qc->free_paths)) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	187
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	188 q = ngx_queue_head(&qc->free_paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	189 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	190
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	191 ngx_queue_remove(&path->queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	192
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	193 ngx_memzero(path, sizeof(ngx_quic_path_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	194
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	195 } else {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	196
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	197 path = ngx_pcalloc(c->pool, sizeof(ngx_quic_path_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	198 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	199 return NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	200 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	201 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	202
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	203 ngx_queue_insert_tail(&qc->paths, &path->queue);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	204
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	205 path->cid = cid;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	206 cid->used = 1;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	207
8729 fb41e37ddeb0 QUIC: decoupled path state and limitation status. Vladimir Homutov <vl@nginx.com> parents: 8728 diff changeset	208 path->limited = 1;
fb41e37ddeb0 QUIC: decoupled path state and limitation status. Vladimir Homutov <vl@nginx.com> parents: 8728 diff changeset	209
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	210 path->seqnum = qc->path_seqnum++;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	211
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	212 path->sockaddr = &path->sa.sockaddr;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	213 path->socklen = socklen;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	214 ngx_memcpy(path->sockaddr, sockaddr, socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	215
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	216 path->addr_text.data = path->text;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	217 path->addr_text.len = ngx_sock_ntop(sockaddr, socklen, path->text,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	218 NGX_SOCKADDR_STRLEN, 1);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	219
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	220 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
8832 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8820 diff changeset	221 "quic path seq:%uL created addr:%V",
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	222 path->seqnum, &path->addr_text);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	223 return path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	224 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	225
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	226
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	227 static ngx_quic_path_t *
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	228 ngx_quic_get_path(ngx_connection_t *c, ngx_uint_t tag)
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	229 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	230 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	231 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	232 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	233
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	234 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	235
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	236 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	237 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	238 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	239 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	240 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	241
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	242 if (path->tag == tag) {
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	243 return path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	244 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	245 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	246
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	247 return NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	248 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	249
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	250
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	251 ngx_int_t
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	252 ngx_quic_set_path(ngx_connection_t c, ngx_quic_header_t pkt)
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	253 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	254 off_t len;
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	255 ngx_queue_t *q;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	256 ngx_quic_path_t path, probe;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	257 ngx_quic_socket_t *qsock;
8798 077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8797 diff changeset	258 ngx_quic_send_ctx_t *ctx;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	259 ngx_quic_client_id_t *cid;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	260 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	261
8728 ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8722 diff changeset	262 qc = ngx_quic_get_connection(c);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	263 qsock = ngx_quic_get_socket(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	264
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	265 len = pkt->raw->last - pkt->raw->start;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	266
8862 c2f5d79cde64 QUIC: separate UDP framework for QUIC. Roman Arutyunyan <arut@nginx.com> parents: 8860 diff changeset	267 if (c->udp->buffer == NULL) {
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	268 /* first ever packet in connection, path already exists */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	269 path = qc->path;
8702 40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8701 diff changeset	270 goto update;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	271 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	272
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	273 probe = NULL;
8437 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8423 diff changeset	274
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	275 for (q = ngx_queue_head(&qc->paths);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	276 q != ngx_queue_sentinel(&qc->paths);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	277 q = ngx_queue_next(q))
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	278 {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	279 path = ngx_queue_data(q, ngx_quic_path_t, queue);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	280
8862 c2f5d79cde64 QUIC: separate UDP framework for QUIC. Roman Arutyunyan <arut@nginx.com> parents: 8860 diff changeset	281 if (ngx_cmp_sockaddr(&qsock->sockaddr.sockaddr, qsock->socklen,
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	282 path->sockaddr, path->socklen, 1)
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	283 == NGX_OK)
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	284 {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	285 goto update;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	286 }
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	287
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	288 if (path->tag == NGX_QUIC_PATH_PROBE) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	289 probe = path;
8437 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8423 diff changeset	290 }
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	291 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	292
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	293 /* packet from new path, drop current probe, if any */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	294
8798 077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8797 diff changeset	295 ctx = ngx_quic_get_send_ctx(qc, pkt->level);
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8797 diff changeset	296
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8797 diff changeset	297 /*
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8797 diff changeset	298 * only accept highest-numbered packets to prevent connection id
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8797 diff changeset	299 * exhaustion by excessive probing packets from unknown paths
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8797 diff changeset	300 */
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8797 diff changeset	301 if (pkt->pn != ctx->largest_pn) {
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8797 diff changeset	302 return NGX_DONE;
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8797 diff changeset	303 }
077a1e403446 QUIC: additional limit for probing packets. Vladimir Homutov <vl@nginx.com> parents: 8797 diff changeset	304
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	305 if (probe && ngx_quic_free_path(c, probe) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	306 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	307 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	308
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	309 /* new path requires new client id */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	310 cid = ngx_quic_next_client_id(c);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	311 if (cid == NULL) {
8930 28fc35b71d75 QUIC: "info" logging level on insufficient client connection ids. Sergey Kandaurov <pluknet@nginx.com> parents: 8862 diff changeset	312 ngx_log_error(NGX_LOG_INFO, c->log, 0,
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	313 "quic no available client ids for new path");
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	314 /* stop processing of this datagram */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	315 return NGX_DONE;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	316 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	317
8862 c2f5d79cde64 QUIC: separate UDP framework for QUIC. Roman Arutyunyan <arut@nginx.com> parents: 8860 diff changeset	318 path = ngx_quic_new_path(c, &qsock->sockaddr.sockaddr, qsock->socklen, cid);
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	319 if (path == NULL) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	320 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	321 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	322
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	323 path->tag = NGX_QUIC_PATH_PROBE;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	324
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	325 /*
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	326 * client arrived using new path and previously seen DCID,
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	327 * this indicates NAT rebinding (or bad client)
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	328 */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	329 if (qsock->used) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	330 pkt->rebound = 1;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	331 }
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	332
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	333 update:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	334
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	335 qsock->used = 1;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	336 pkt->path = path;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	337
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	338 /* TODO: this may be too late in some cases;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	339 * for example, if error happens during decrypt(), we cannot
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	340 * send CC, if error happens in 1st packet, due to amplification
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	341 * limit, because path->received = 0
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	342 *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	343 * should we account garbage as received or only decrypting packets?
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	344 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	345 path->received += len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	346
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	347 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
8832 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8820 diff changeset	348 "quic packet len:%O via sock seq:%L path seq:%uL",
8820 da24a78720eb QUIC: fixed handling of initial source connection id. Vladimir Homutov <vl@nginx.com> parents: 8798 diff changeset	349 len, (int64_t) qsock->sid.seqnum, path->seqnum);
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	350 ngx_quic_path_dbg(c, "status", path);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	351
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	352 return NGX_OK;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	353 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	354
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	355
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	356 ngx_int_t
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	357 ngx_quic_free_path(ngx_connection_t c, ngx_quic_path_t path)
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	358 {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	359 ngx_quic_connection_t *qc;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	360
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	361 qc = ngx_quic_get_connection(c);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	362
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	363 ngx_queue_remove(&path->queue);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	364 ngx_queue_insert_head(&qc->free_paths, &path->queue);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	365
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	366 /*
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	367 * invalidate CID that is no longer usable for any other path;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	368 * this also requests new CIDs from client
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	369 */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	370 if (path->cid) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	371 if (ngx_quic_free_client_id(c, path->cid) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	372 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	373 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	374 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	375
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	376 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
8832 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8820 diff changeset	377 "quic path seq:%uL addr:%V retired",
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	378 path->seqnum, &path->addr_text);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	379
8387 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	380 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	381 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	382
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	383
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	384 static void
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	385 ngx_quic_set_connection_path(ngx_connection_t c, ngx_quic_path_t path)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	386 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	387 size_t len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	388
8860 a2fbae359828 QUIC: fixed indentation. Sergey Kandaurov <pluknet@nginx.com> parents: 8832 diff changeset	389 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	390 c->socklen = path->socklen;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	391
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	392 if (c->addr_text.data) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	393 len = ngx_min(c->addr_text.len, path->addr_text.len);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	394
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	395 ngx_memcpy(c->addr_text.data, path->addr_text.data, len);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	396 c->addr_text.len = len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	397 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	398
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	399 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
8832 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8820 diff changeset	400 "quic send path set to seq:%uL addr:%V",
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	401 path->seqnum, &path->addr_text);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	402 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	403
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	404
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	405 ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	406 ngx_quic_handle_migration(ngx_connection_t c, ngx_quic_header_t pkt)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	407 {
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	408 ngx_quic_path_t next, bkp;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	409 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	410 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	411
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	412 /* got non-probing packet via non-active path */
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	413
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	414 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	415
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	416 ctx = ngx_quic_get_send_ctx(qc, pkt->level);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	417
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	418 /*
8498 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	419 * RFC 9000, 9.3. Responding to Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	420 *
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	421 * An endpoint only changes the address to which it sends packets in
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	422 * response to the highest-numbered non-probing packet.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	423 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	424 if (pkt->pn != ctx->largest_pn) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	425 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	426 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	427
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	428 next = pkt->path;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	429
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	430 /*
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	431 * RFC 9000, 9.3.3:
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	432 *
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	433 * In response to an apparent migration, endpoints MUST validate the
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	434 * previously active path using a PATH_CHALLENGE frame.
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	435 */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	436 if (pkt->rebound) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	437
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	438 /* NAT rebinding: client uses new path with old SID */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	439 if (ngx_quic_validate_path(c, qc->path) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	440 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	441 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	442 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	443
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	444 if (qc->path->validated) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	445
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	446 if (next->tag != NGX_QUIC_PATH_BACKUP) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	447 /* can delete backup path, if any */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	448 bkp = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	449
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	450 if (bkp && ngx_quic_free_path(c, bkp) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	451 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	452 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	453 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	454
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	455 qc->path->tag = NGX_QUIC_PATH_BACKUP;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	456 ngx_quic_path_dbg(c, "is now backup", qc->path);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	457
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	458 } else {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	459 if (ngx_quic_free_path(c, qc->path) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	460 return NGX_ERROR;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	461 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	462 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	463
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	464 /* switch active path to migrated */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	465 qc->path = next;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	466 qc->path->tag = NGX_QUIC_PATH_ACTIVE;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	467
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	468 ngx_quic_set_connection_path(c, next);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	469
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	470 if (!next->validated && !next->validating) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	471 if (ngx_quic_validate_path(c, next) != NGX_OK) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	472 return NGX_ERROR;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	473 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	474 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	475
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	476 ngx_log_error(NGX_LOG_INFO, c->log, 0,
8832 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8820 diff changeset	477 "quic migrated to path seq:%uL addr:%V",
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	478 qc->path->seqnum, &qc->path->addr_text);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	479
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	480 ngx_quic_path_dbg(c, "is now active", qc->path);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	481
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	482 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	483 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	484
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	485
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	486 static ngx_int_t
8757 b7284807b4fa QUIC: refactored ngx_quic_validate_path(). Vladimir Homutov <vl@nginx.com> parents: 8756 diff changeset	487 ngx_quic_validate_path(ngx_connection_t c, ngx_quic_path_t path)
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	488 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	489 ngx_msec_t pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	490 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	491 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	492
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	493 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	494
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	495 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
8832 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8820 diff changeset	496 "quic initiated validation of path seq:%uL", path->seqnum);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	497
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	498 path->validating = 1;
9082 c6db94ec3841 QUIC: separated path validation retransmit backoff. Sergey Kandaurov <pluknet@nginx.com> parents: 8930 diff changeset	499 path->tries = 0;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	500
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	501 if (RAND_bytes(path->challenge1, 8) != 1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	502 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	503 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	504
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	505 if (RAND_bytes(path->challenge2, 8) != 1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	506 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	507 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	508
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	509 if (ngx_quic_send_path_challenge(c, path) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	510 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	511 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	512
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	513 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	514 pto = ngx_quic_pto(c, ctx);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	515
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	516 path->expires = ngx_current_msec + pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	517
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	518 if (!qc->path_validation.timer_set) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	519 ngx_add_timer(&qc->path_validation, pto);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	520 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	521
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	522 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	523 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	524
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	525
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	526 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	527 ngx_quic_send_path_challenge(ngx_connection_t c, ngx_quic_path_t path)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	528 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	529 ngx_quic_frame_t frame;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	530
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	531 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
8832 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8820 diff changeset	532 "quic path seq:%uL send path_challenge tries:%ui",
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	533 path->seqnum, path->tries);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	534
8722 02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8721 diff changeset	535 ngx_memzero(&frame, sizeof(ngx_quic_frame_t));
02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8721 diff changeset	536
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	537 frame.level = ssl_encryption_application;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	538 frame.type = NGX_QUIC_FT_PATH_CHALLENGE;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	539
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	540 ngx_memcpy(frame.u.path_challenge.data, path->challenge1, 8);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	541
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	542 /*
8498 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	543 * RFC 9000, 8.2.1. Initiating Path Validation
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	544 *
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	545 * An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	546 * to at least the smallest allowed maximum datagram size of 1200 bytes,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	547 * unless the anti-amplification limit for the path does not permit
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	548 * sending a datagram of this size.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	549 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	550
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	551 /* same applies to PATH_RESPONSE frames */
8721 501f28679d56 QUIC: refactored ngx_quic_frame_sendto() function. Vladimir Homutov <vl@nginx.com> parents: 8706 diff changeset	552 if (ngx_quic_frame_sendto(c, &frame, 1200, path) != NGX_OK) {
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	553 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	554 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	555
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	556 ngx_memcpy(frame.u.path_challenge.data, path->challenge2, 8);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	557
8721 501f28679d56 QUIC: refactored ngx_quic_frame_sendto() function. Vladimir Homutov <vl@nginx.com> parents: 8706 diff changeset	558 if (ngx_quic_frame_sendto(c, &frame, 1200, path) != NGX_OK) {
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	559 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	560 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	561
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	562 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	563 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	564
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	565
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	566 void
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	567 ngx_quic_path_validation_handler(ngx_event_t *ev)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	568 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	569 ngx_msec_t now;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	570 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	571 ngx_msec_int_t left, next, pto;
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	572 ngx_quic_path_t path, bkp;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	573 ngx_connection_t *c;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	574 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	575 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	576
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	577 c = ev->data;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	578 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	579
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	580 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	581
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	582 next = -1;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	583 now = ngx_current_msec;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	584
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	585 q = ngx_queue_head(&qc->paths);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	586
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	587 while (q != ngx_queue_sentinel(&qc->paths)) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	588
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	589 path = ngx_queue_data(q, ngx_quic_path_t, queue);
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	590 q = ngx_queue_next(q);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	591
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	592 if (!path->validating) {
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	593 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	594 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	595
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	596 left = path->expires - now;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	597
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	598 if (left > 0) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	599
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	600 if (next == -1 \|\| left < next) {
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	601 next = left;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	602 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	603
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	604 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	605 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	606
9082 c6db94ec3841 QUIC: separated path validation retransmit backoff. Sergey Kandaurov <pluknet@nginx.com> parents: 8930 diff changeset	607 if (++path->tries < NGX_QUIC_PATH_RETRIES) {
c6db94ec3841 QUIC: separated path validation retransmit backoff. Sergey Kandaurov <pluknet@nginx.com> parents: 8930 diff changeset	608 pto = ngx_quic_pto(c, ctx) << path->tries;
c6db94ec3841 QUIC: separated path validation retransmit backoff. Sergey Kandaurov <pluknet@nginx.com> parents: 8930 diff changeset	609
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	610 path->expires = ngx_current_msec + pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	611
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	612 if (next == -1 \|\| pto < next) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	613 next = pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	614 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	615
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	616 /* retransmit */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	617 (void) ngx_quic_send_path_challenge(c, path);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	618
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	619 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	620 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	621
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	622 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
8832 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8820 diff changeset	623 "quic path seq:%uL validation failed", path->seqnum);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	624
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	625 /* found expired path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	626
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	627 path->validated = 0;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	628 path->validating = 0;
8729 fb41e37ddeb0 QUIC: decoupled path state and limitation status. Vladimir Homutov <vl@nginx.com> parents: 8728 diff changeset	629 path->limited = 1;
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	630
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	631
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	632 /* RFC 9000, 9.3.2. On-Path Address Spoofing
8498 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8438 diff changeset	633 *
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	634 * To protect the connection from failing due to such a spurious
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	635 * migration, an endpoint MUST revert to using the last validated
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	636 * peer address when validation of a new peer address fails.
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	637 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	638
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	639 if (qc->path == path) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	640 /* active path validation failed */
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	641
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	642 bkp = ngx_quic_get_path(c, NGX_QUIC_PATH_BACKUP);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	643
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	644 if (bkp == NULL) {
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	645 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	646 qc->error_reason = "no viable path";
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	647 ngx_quic_close_connection(c, NGX_ERROR);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	648 return;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	649 }
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	650
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	651 qc->path = bkp;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	652 qc->path->tag = NGX_QUIC_PATH_ACTIVE;
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	653
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	654 ngx_quic_set_connection_path(c, qc->path);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	655
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	656 ngx_log_error(NGX_LOG_INFO, c->log, 0,
8832 fab36e4abf83 QUIC: got rid of hash symbol in backup and logging. Vladimir Homutov <vl@nginx.com> parents: 8820 diff changeset	657 "quic path seq:%uL addr:%V is restored from backup",
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	658 qc->path->seqnum, &qc->path->addr_text);
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	659
1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	660 ngx_quic_path_dbg(c, "is active", qc->path);
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	661 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	662
8797 1e2f4e9c8195 QUIC: reworked migration handling. Vladimir Homutov <vl@nginx.com> parents: 8757 diff changeset	663 if (ngx_quic_free_path(c, path) != NGX_OK) {
8423 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	664 ngx_quic_close_connection(c, NGX_ERROR);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	665 return;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	666 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	667 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	668
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	669 if (next != -1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	670 ngx_add_timer(&qc->path_validation, next);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	671 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8407 diff changeset	672 }

Mercurial > hg > nginx-quic

annotate src/event/quic/ngx_event_quic_migration.c @ 9082:c6db94ec3841 quic