nginx: src/event/quic/ngx_event_quic

annotate src/event/quic/ngx_event_quic_migration.c @ 8797:4715f3e669f1 quic

QUIC: updated specification references. This includes updating citations and further clarification.

author	Sergey Kandaurov <pluknet@nginx.com>
date	Wed, 16 Jun 2021 11:55:12 +0300
parents	5186ee5a94b9
children	ad046179eb91

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
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	13 static void ngx_quic_set_connection_path(ngx_connection_t *c,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	14 ngx_quic_path_t *path);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	15 static ngx_int_t ngx_quic_validate_path(ngx_connection_t *c,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	16 ngx_quic_socket_t *qsock);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 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: 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_path_restore(ngx_connection_t *c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	20 static ngx_quic_path_t ngx_quic_alloc_path(ngx_connection_t c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	21
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	22
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	23 ngx_int_t
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	24 ngx_quic_handle_path_challenge_frame(ngx_connection_t *c,
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	25 ngx_quic_path_challenge_frame_t *f)
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	26 {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	27 off_t max, pad;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	28 ssize_t sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	29 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	30 ngx_quic_frame_t frame, *fp;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	31 ngx_quic_socket_t *qsock;
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	32 ngx_quic_connection_t *qc;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	33
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	34 qc = ngx_quic_get_connection(c);
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	35
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	36 frame.level = ssl_encryption_application;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	37 frame.type = NGX_QUIC_FT_PATH_RESPONSE;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	38 frame.u.path_response = *f;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	39
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	40 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	41 * RFC 9000, 8.2.2. Path Validation Responses
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	42 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	43 * 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	44 * PATH_CHALLENGE frame was received.
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	45 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	46 qsock = ngx_quic_get_socket(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	47 path = qsock->path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	48
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	49 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	50 * An endpoint MUST NOT expand the datagram containing the PATH_RESPONSE
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	51 * if the resulting data exceeds the anti-amplification limit.
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	52 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	53 max = path->received * 3;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	54 max = (path->sent >= max) ? 0 : max - path->sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	55 pad = ngx_min(1200, max);
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 sent = ngx_quic_frame_sendto(c, &frame, pad, path->sockaddr, path->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	58 if (sent == -1) {
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	59 return NGX_ERROR;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	60 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	61
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	62 path->sent += sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	63
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	64 if (qsock == qc->socket) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	65 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	66 * RFC 9000, 9.3.3. Off-Path Packet Forwarding
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	67 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	68 * 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	69 * send a non-probing packet in response.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	70 */
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	71
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	72 fp = ngx_quic_alloc_frame(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	73 if (fp == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	74 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	75 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	76
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	77 fp->level = ssl_encryption_application;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	78 fp->type = NGX_QUIC_FT_PING;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	79
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	80 ngx_quic_queue_frame(qc, fp);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	81 }
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	82
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	83 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	84 }
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 ngx_int_t
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	88 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	89 ngx_quic_path_challenge_frame_t *f)
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	90 {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	91 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	92 ngx_quic_path_t path, prev;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	93 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	94
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	95 qc = ngx_quic_get_connection(c);
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 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	98 * RFC 9000, 8.2.3. Successful Path Validation
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	99 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	100 * 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	101 * on which the PATH_CHALLENGE was sent.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	102 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	103
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	104 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	105 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	106 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	107 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	108 path = ngx_queue_data(q, ngx_quic_path_t, queue);
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 if (path->state != NGX_QUIC_PATH_VALIDATING) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	111 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	112 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	113
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	114 if (ngx_memcmp(path->challenge1, f->data, sizeof(f->data)) == 0
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	115 \|\| ngx_memcmp(path->challenge2, f->data, sizeof(f->data)) == 0)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	116 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	117 goto valid;
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 }
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 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	122 "quic stale PATH_RESPONSE ignored");
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	123
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	124 return NGX_OK;
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 valid:
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 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	129 * RFC 9000, 9.4. Loss Detection and Congestion Control
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	130 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	131 * On confirming a peer's ownership of its new address,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	132 * an endpoint MUST immediately reset the congestion controller
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	133 * 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	134 * 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	135 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	136
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	137 prev = qc->backup->path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	138
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	139 if (ngx_cmp_sockaddr(prev->sockaddr, prev->socklen,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	140 path->sockaddr, path->socklen, 0)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	141 != NGX_OK)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	142 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	143 /* address has changed */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	144 ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	145
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	146 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	147 ngx_max(2 * qc->tp.max_udp_payload_size,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	148 14720));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	149 qc->congestion.ssthresh = (size_t) -1;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	150 qc->congestion.recovery_start = ngx_current_msec;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	151 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	152
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	153 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	154 * RFC 9000, 9.3. Responding to Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	155 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	156 * After verifying a new client address, the server SHOULD
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	157 * send new address validation tokens (Section 8) to the client.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	158 */
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 if (ngx_quic_send_new_token(c, path) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	161 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	162 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	163
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	164 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	165 "quic path #%uL successfully validated", path->seqnum);
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 path->state = NGX_QUIC_PATH_VALIDATED;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	168 path->validated_at = ngx_time();
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	169
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	170 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	171 }
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 static ngx_quic_path_t *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	175 ngx_quic_alloc_path(ngx_connection_t *c)
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 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	178 struct sockaddr *sa;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	179 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	180 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	181
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	182 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	183
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	184 if (!ngx_queue_empty(&qc->free_paths)) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	185
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	186 q = ngx_queue_head(&qc->free_paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	187 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	188
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	189 ngx_queue_remove(&path->queue);
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 sa = path->sockaddr;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	192 ngx_memzero(path, sizeof(ngx_quic_path_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	193 path->sockaddr = sa;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	194
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	195 } else {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	196
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	197 path = ngx_pcalloc(c->pool, sizeof(ngx_quic_path_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	198 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	199 return NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	200 }
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 path->sockaddr = ngx_palloc(c->pool, NGX_SOCKADDRLEN);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	203 if (path->sockaddr == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	204 return NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	205 }
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	208 return path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	209 }
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	212 ngx_quic_path_t *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	213 ngx_quic_add_path(ngx_connection_t c, struct sockaddr sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	214 socklen_t socklen)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	215 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	216 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	217 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	218
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	219 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	220
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	221 path = ngx_quic_alloc_path(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	222 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	223 return NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	224 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	225
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	226 path->seqnum = qc->path_seqnum++;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	227
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	228 path->socklen = socklen;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	229 ngx_memcpy(path->sockaddr, sockaddr, socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	230
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	231 path->addr_text.data = path->text;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	232 path->addr_text.len = ngx_sock_ntop(sockaddr, socklen, path->text,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	233 NGX_SOCKADDR_STRLEN, 1);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	234
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	235 ngx_queue_insert_tail(&qc->paths, &path->queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	236
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	237 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	238 "quic path #%uL created src:%V",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	239 path->seqnum, &path->addr_text);
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 return path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	242 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	243
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	244
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	245 ngx_quic_path_t *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	246 ngx_quic_find_path(ngx_connection_t c, struct sockaddr sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	247 socklen_t socklen)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	248 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	249 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	250 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	251 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	252
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	253 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	254
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	255 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	256 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	257 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	258 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	259 path = ngx_queue_data(q, ngx_quic_path_t, queue);
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 if (ngx_cmp_sockaddr(sockaddr, socklen,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	262 path->sockaddr, path->socklen, 1)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	263 == NGX_OK)
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 return path;
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 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	268
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	269 return NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	270 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	271
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	272
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	273 ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	274 ngx_quic_check_migration(ngx_connection_t c, ngx_quic_header_t pkt)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	275 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	276 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	277 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	278 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	279
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	280 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	281
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	282 qsock = ngx_quic_get_socket(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	283
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	284 if (c->udp->dgram == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	285 /* 2nd QUIC packet in first UDP datagram */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	286 return NGX_OK;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	289 path = ngx_quic_find_path(c, c->udp->dgram->sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	290 c->udp->dgram->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	291 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	292 /* packet comes from unknown path, possibly migration */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	293
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	294 if (qc->tp.disable_active_migration) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	295 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	296 "quic migration disabled, dropping packet "
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	297 "from unknown path");
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	298 return NGX_DECLINED;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	299 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	300
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	301 if (pkt->level != ssl_encryption_application) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	302 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	303 "quic too early migration attempt");
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	304 return NGX_DECLINED;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	305 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	306
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	307 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	308 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	309
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	310 /* packet from known path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	311
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	312 if (qsock->path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	313 /* client switched to previously unused server id */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	314 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	315 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	316
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	317 if (path == qsock->path) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	318 /* regular packet to expected path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	319 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	320 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	321
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	322 /* client is trying to use server id already used on other path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	323
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	324 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	325 "quic attempt to use socket #%uL:%uL:%uL with path #%uL",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	326 qsock->sid.seqnum, qsock->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	327 qsock->path->seqnum, path->seqnum);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	328
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	329 return NGX_DECLINED;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	330 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	331
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	332
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	333 ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	334 ngx_quic_update_paths(ngx_connection_t c, ngx_quic_header_t pkt)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	335 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	336 off_t len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	337 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	338 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	339 ngx_quic_client_id_t *cid;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	340 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	341
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	342 qsock = ngx_quic_get_socket(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	343 path = qsock->path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	344
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	345 if (path) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	346 goto update;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	347 }
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 path = ngx_quic_find_path(c, c->udp->dgram->sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	350 c->udp->dgram->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	351
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	352 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	353 path = ngx_quic_add_path(c, c->udp->dgram->sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	354 c->udp->dgram->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	355 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	356 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	357 }
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
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	360 /* prefer unused client IDs if available */
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	361 cid = ngx_quic_next_client_id(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	362 if (cid == NULL) {
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	363
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	364 /* try to reuse connection ID used on the same path */
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	365 cid = ngx_quic_used_client_id(c, path);
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	366 if (cid == NULL) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	367
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	368 qc = ngx_quic_get_connection(c);
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	369 qc->error = NGX_QUIC_ERR_CONNECTION_ID_LIMIT_ERROR;
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	370 qc->error_reason = "no available client ids for new path";
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	371
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	372 ngx_log_error(NGX_LOG_ERR, c->log, 0,
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	373 "no available client ids for new path");
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	374
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	375 return NGX_ERROR;
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	376 }
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	377 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	378
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	379 ngx_quic_connect(c, qsock, path, cid);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	380
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	381 update:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	382
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	383 if (pkt->raw->start == pkt->data) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	384 len = pkt->raw->last - pkt->raw->start;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	385
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	386 } else {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	387 len = 0;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	388 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	389
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	390 /* TODO: this may be too late in some cases;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	391 * for example, if error happens during decrypt(), we cannot
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	392 * send CC, if error happens in 1st packet, due to amplification
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	393 * limit, because path->received = 0
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	394 *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	395 * should we account garbage as received or only decrypting packets?
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	396 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	397 path->received += len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	398
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	399 ngx_log_debug6(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	400 "quic packet via #%uL:%uL:%uL"
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	401 " size:%O path recvd:%O sent:%O",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	402 qsock->sid.seqnum, qsock->cid->seqnum, path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	403 len, path->received, path->sent);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	404
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	405 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	406 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	407
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	408
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	409 static void
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	410 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	411 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	412 size_t len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	413
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	414 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	415 c->socklen = path->socklen;
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 if (c->addr_text.data) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	418 len = ngx_min(c->addr_text.len, path->addr_text.len);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	419
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	420 ngx_memcpy(c->addr_text.data, path->addr_text.data, len);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	421 c->addr_text.len = len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	422 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	423
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	424 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	425 "quic send path set to #%uL addr:%V",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	426 path->seqnum, &path->addr_text);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	427 }
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	430 ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	431 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	432 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	433 ngx_quic_path_t *next;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	434 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	435 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	436 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	437
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	438 /* got non-probing packet via non-active socket with different path */
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 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	441
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	442 /* current socket, different from active */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	443 qsock = ngx_quic_get_socket(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	444
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	445 next = qsock->path; /* going to migrate to this path... */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	446
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	447 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	448 "quic migration from #%uL:%uL:%uL (%s)"
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	449 " to #%uL:%uL:%uL (%s)",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	450 qc->socket->sid.seqnum, qc->socket->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	451 qc->socket->path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	452 ngx_quic_path_state_str(qc->socket->path),
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	453 qsock->sid.seqnum, qsock->cid->seqnum, next->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	454 ngx_quic_path_state_str(next));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	455
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	456 switch (next->state) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	457 case NGX_QUIC_PATH_NEW:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	458 if (ngx_quic_validate_path(c, qsock) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	459 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	460 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	461 break;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	462
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	463 /* migration to previously known path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	464
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	465 case NGX_QUIC_PATH_VALIDATING:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	466 /* alredy validating, nothing to do */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	467 break;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	468
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	469 case NGX_QUIC_PATH_VALIDATED:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	470 /* if path is old enough, revalidate */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	471 if (ngx_time() - next->validated_at > NGX_QUIC_PATH_VALID_TIME) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	472
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	473 next->state = NGX_QUIC_PATH_NEW;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	474
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	475 if (ngx_quic_validate_path(c, qsock) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	476 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	477 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	478 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	479
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	480 break;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	481 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	482
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	483 ctx = ngx_quic_get_send_ctx(qc, pkt->level);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	484
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	485 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	486 * RFC 9000, 9.3. Responding to Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	487 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	488 * 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	489 * response to the highest-numbered non-probing packet.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	490 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	491 if (pkt->pn != ctx->largest_pn) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	492 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	493 }
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 /* switching connection to new path */
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 ngx_quic_set_connection_path(c, next);
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 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	500 * RFC 9000, 9.5. Privacy Implications of Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	501 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	502 * An endpoint MUST NOT reuse a connection ID when sending to
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	503 * more than one destination address.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	504 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	505
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	506 /* preserve valid path we are migrating from */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	507 if (qc->socket->path->state == NGX_QUIC_PATH_VALIDATED) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	508
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	509 if (qc->backup) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	510 ngx_quic_close_socket(c, qc->backup);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	511 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	512
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	513 qc->backup = qc->socket;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	514
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	515 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	516 "quic backup socket is now #%uL:%uL:%uL (%s)",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	517 qc->backup->sid.seqnum, qc->backup->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	518 qc->backup->path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	519 ngx_quic_path_state_str(qc->backup->path));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	520 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	521
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	522 qc->socket = qsock;
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 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	525 "quic active socket is now #%uL:%uL:%uL (%s)",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	526 qsock->sid.seqnum, qsock->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	527 qsock->path->seqnum, ngx_quic_path_state_str(qsock->path));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	528
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	529 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	530 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	531
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	532
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	533 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	534 ngx_quic_validate_path(ngx_connection_t c, ngx_quic_socket_t qsock)
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 ngx_msec_t pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	537 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	538 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	539 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	540
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	541 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	542
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	543 path = qsock->path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	544
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	545 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	546 "quic initiated validation of new path #%uL",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	547 path->seqnum);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	548
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	549 path->state = NGX_QUIC_PATH_VALIDATING;
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 if (RAND_bytes(path->challenge1, 8) != 1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	552 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	553 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	554
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	555 if (RAND_bytes(path->challenge2, 8) != 1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	556 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	557 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	558
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	559 if (ngx_quic_send_path_challenge(c, path) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	560 return NGX_ERROR;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	563 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	564 pto = ngx_quic_pto(c, ctx);
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 path->expires = ngx_current_msec + pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	567 path->tries = NGX_QUIC_PATH_RETRIES;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	568
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	569 if (!qc->path_validation.timer_set) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	570 ngx_add_timer(&qc->path_validation, pto);
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	577 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	578 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	579 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	580 off_t max, pad;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	581 ssize_t sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	582 ngx_quic_frame_t frame;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	583
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	584 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	585 "quic path #%uL send path challenge tries:%ui",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	586 path->seqnum, path->tries);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	587
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	588 frame.level = ssl_encryption_application;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	589 frame.type = NGX_QUIC_FT_PATH_CHALLENGE;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	590
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	591 ngx_memcpy(frame.u.path_challenge.data, path->challenge1, 8);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	592
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	593 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	594 * RFC 9000, 8.2.1. Initiating Path Validation
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	595 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	596 * An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	597 * 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	598 * unless the anti-amplification limit for the path does not permit
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	599 * sending a datagram of this size.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	600 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	601
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	602 /* same applies to PATH_RESPONSE frames */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	603
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	604 max = path->received * 3;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	605 max = (path->sent >= max) ? 0 : max - path->sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	606 pad = ngx_min(1200, max);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	607
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	608 sent = ngx_quic_frame_sendto(c, &frame, pad, path->sockaddr, path->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	609 if (sent == -1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	610 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	611 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	612
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	613 path->sent += sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	614
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	615 ngx_memcpy(frame.u.path_challenge.data, path->challenge2, 8);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	616
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	617 max = (path->sent >= max) ? 0 : max - path->sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	618 pad = ngx_min(1200, max);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	619
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	620 sent = ngx_quic_frame_sendto(c, &frame, pad, path->sockaddr, path->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	621 if (sent == -1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	622 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	623 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	624
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	625 path->sent += sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	626
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	627 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	628 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	629
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	630
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	631 void
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	632 ngx_quic_path_validation_handler(ngx_event_t *ev)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	633 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	634 ngx_msec_t now;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	635 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	636 ngx_msec_int_t left, next, pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	637 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	638 ngx_connection_t *c;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	639 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	640 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	641
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	642 c = ev->data;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	643 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	644
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	645 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	646 pto = ngx_quic_pto(c, ctx);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	647
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	648 next = -1;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	649 now = ngx_current_msec;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	650
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	651 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	652 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	653 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	654 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	655 path = ngx_queue_data(q, ngx_quic_path_t, queue);
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 if (path->state != NGX_QUIC_PATH_VALIDATING) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	658 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	659 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	660
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	661 left = path->expires - now;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	662
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	663 if (left > 0) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	664
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	665 if (next == -1 \|\| left < next) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	666 next = path->expires;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	667 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	668
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	669 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	670 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	671
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	672 if (--path->tries) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	673 path->expires = ngx_current_msec + pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	674
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	675 if (next == -1 \|\| pto < next) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	676 next = pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	677 }
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 /* retransmit */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	680 (void) ngx_quic_send_path_challenge(c, path);
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 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	683 }
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 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	686 "quic path #%uL validation failed", path->seqnum);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	687
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	688 /* found expired path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	689
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	690 path->state = NGX_QUIC_PATH_NEW;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	691
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	692 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	693 * RFC 9000, 9.4. Loss Detection and Congestion Control
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	694 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	695 * If the timer fires before the PATH_RESPONSE is received, the
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	696 * endpoint might send a new PATH_CHALLENGE and restart the timer for
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	697 * a longer period of time. This timer SHOULD be set as described in
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	698 * Section 6.2.1 of [QUIC-RECOVERY] and MUST NOT be more aggressive.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	699 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	700
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	701 if (qc->socket->path != path) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	702 /* the path was not actually used */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	703 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	704 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	705
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	706 if (ngx_quic_path_restore(c) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	707 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	708 qc->error_reason = "no viable path";
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	709 ngx_quic_close_connection(c, NGX_ERROR);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	710 return;
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 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	713
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	714 if (next != -1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	715 ngx_add_timer(&qc->path_validation, next);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	716 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	717 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	718
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	719
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	720 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	721 ngx_quic_path_restore(ngx_connection_t *c)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	722 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	723 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	724 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	725
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	726 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	727
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	728 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	729 * RFC 9000, 9.1. Probing a New Path
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	730 *
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	731 * Failure to validate a path does not cause the connection to end
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	732 *
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	733 * RFC 9000, 9.3.2. On-Path Address Spoofing
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	734 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	735 * To protect the connection from failing due to such a spurious
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	736 * migration, an endpoint MUST revert to using the last validated
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	737 * peer address when validation of a new peer address fails.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	738 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	739
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	740 if (qc->backup == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	741 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	742 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	743
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	744 qc->socket = qc->backup;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	745 qc->backup = NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	746
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	747 qsock = qc->socket;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	748
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	749 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	750 "quic active socket is restored to #%uL:%uL:%uL"
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	751 " (%s), no backup",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	752 qsock->sid.seqnum, qsock->cid->seqnum, qsock->path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	753 ngx_quic_path_state_str(qsock->path));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	754
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	755 ngx_quic_set_connection_path(c, qsock->path);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	756
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	757 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	758 }

Mercurial > hg > nginx

annotate src/event/quic/ngx_event_quic_migration.c @ 8797:4715f3e669f1 quic