nginx: src/event/quic/ngx_event_quic

annotate src/event/quic/ngx_event_quic_migration.c @ 8932:501f28679d56 quic

QUIC: refactored ngx_quic_frame_sendto() function. The function now takes path as an argument to deal with associated restrictions and update sent counter.

author	Vladimir Homutov <vl@nginx.com>
date	Thu, 09 Dec 2021 12:40:14 +0300
parents	bb1d1d9d76e2
children	02a9ad88e2df

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 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	28 ngx_quic_frame_t frame, *fp;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	29 ngx_quic_socket_t *qsock;
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	30 ngx_quic_connection_t *qc;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	31
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	32 qc = ngx_quic_get_connection(c);
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	33
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	34 frame.level = ssl_encryption_application;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	35 frame.type = NGX_QUIC_FT_PATH_RESPONSE;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	36 frame.u.path_response = *f;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	37
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	38 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	39 * RFC 9000, 8.2.2. Path Validation Responses
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	40 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	41 * 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	42 * PATH_CHALLENGE frame was received.
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	43 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	44 qsock = ngx_quic_get_socket(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	45 path = qsock->path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	46
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	47 /*
8901 a951e0809044 QUIC: fixed PATH_RESPONSE frame expansion. Vladimir Homutov <vl@nginx.com> parents: 8822 diff changeset	48 * An endpoint MUST expand datagrams that contain a PATH_RESPONSE frame
a951e0809044 QUIC: fixed PATH_RESPONSE frame expansion. Vladimir Homutov <vl@nginx.com> parents: 8822 diff changeset	49 * to at least the smallest allowed maximum datagram size of 1200 bytes.
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	50 */
8932 501f28679d56 QUIC: refactored ngx_quic_frame_sendto() function. Vladimir Homutov <vl@nginx.com> parents: 8917 diff changeset	51 if (ngx_quic_frame_sendto(c, &frame, 1200, path) != NGX_OK) {
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	52 return NGX_ERROR;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	53 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	54
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	55 if (qsock == qc->socket) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	56 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	57 * RFC 9000, 9.3.3. Off-Path Packet Forwarding
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	58 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	59 * 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	60 * send a non-probing packet in response.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	61 */
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	62
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	63 fp = ngx_quic_alloc_frame(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	64 if (fp == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	65 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	66 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	67
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	68 fp->level = ssl_encryption_application;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	69 fp->type = NGX_QUIC_FT_PING;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	70
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	71 ngx_quic_queue_frame(qc, fp);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	72 }
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	73
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	74 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	75 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	76
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	77
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	78 ngx_int_t
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	79 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	80 ngx_quic_path_challenge_frame_t *f)
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	81 {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	82 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	83 ngx_quic_path_t path, prev;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	84 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	85
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	86 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	87
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	88 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	89 * RFC 9000, 8.2.3. Successful Path Validation
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	90 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	91 * 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	92 * on which the PATH_CHALLENGE was sent.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	93 */
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 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	96 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	97 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	98 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	99 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	100
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	101 if (path->state != NGX_QUIC_PATH_VALIDATING) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	102 continue;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	105 if (ngx_memcmp(path->challenge1, f->data, sizeof(f->data)) == 0
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	106 \|\| ngx_memcmp(path->challenge2, f->data, sizeof(f->data)) == 0)
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 goto valid;
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 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	111
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	112 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	113 "quic stale PATH_RESPONSE ignored");
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	114
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	115 return NGX_OK;
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 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 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	120 * RFC 9000, 9.4. Loss Detection and Congestion Control
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	121 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	122 * On confirming a peer's ownership of its new address,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	123 * an endpoint MUST immediately reset the congestion controller
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	124 * 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	125 * 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	126 */
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 prev = qc->backup->path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	129
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	130 if (ngx_cmp_sockaddr(prev->sockaddr, prev->socklen,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	131 path->sockaddr, path->socklen, 0)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	132 != NGX_OK)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	133 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	134 /* address has changed */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	135 ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t));
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 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	138 ngx_max(2 * qc->tp.max_udp_payload_size,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	139 14720));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	140 qc->congestion.ssthresh = (size_t) -1;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	141 qc->congestion.recovery_start = ngx_current_msec;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	144 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	145 * RFC 9000, 9.3. Responding to Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	146 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	147 * After verifying a new client address, the server SHOULD
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	148 * send new address validation tokens (Section 8) to the client.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	149 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	150
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	151 if (ngx_quic_send_new_token(c, path) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	152 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	153 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	154
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	155 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	156 "quic path #%uL successfully validated", path->seqnum);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	157
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	158 path->state = NGX_QUIC_PATH_VALIDATED;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	159 path->validated_at = ngx_time();
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	160
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	161 return NGX_OK;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	165 static ngx_quic_path_t *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	166 ngx_quic_alloc_path(ngx_connection_t *c)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	167 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	168 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	169 struct sockaddr *sa;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	170 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	171 ngx_quic_connection_t *qc;
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 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	174
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	175 if (!ngx_queue_empty(&qc->free_paths)) {
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 q = ngx_queue_head(&qc->free_paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	178 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	179
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	180 ngx_queue_remove(&path->queue);
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 sa = path->sockaddr;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	183 ngx_memzero(path, sizeof(ngx_quic_path_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	184 path->sockaddr = sa;
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 } else {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	187
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	188 path = ngx_pcalloc(c->pool, sizeof(ngx_quic_path_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	189 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	190 return NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	191 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	192
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	193 path->sockaddr = ngx_palloc(c->pool, NGX_SOCKADDRLEN);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	194 if (path->sockaddr == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	195 return NULL;
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 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	198
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	199 return path;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	203 ngx_quic_path_t *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	204 ngx_quic_add_path(ngx_connection_t c, struct sockaddr sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	205 socklen_t socklen)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	206 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	207 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	208 ngx_quic_connection_t *qc;
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 qc = ngx_quic_get_connection(c);
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 path = ngx_quic_alloc_path(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	213 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	214 return NULL;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	217 path->seqnum = qc->path_seqnum++;
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 path->socklen = socklen;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	220 ngx_memcpy(path->sockaddr, sockaddr, socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	221
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	222 path->addr_text.data = path->text;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	223 path->addr_text.len = ngx_sock_ntop(sockaddr, socklen, path->text,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	224 NGX_SOCKADDR_STRLEN, 1);
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 ngx_queue_insert_tail(&qc->paths, &path->queue);
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 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	229 "quic path #%uL created src:%V",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	230 path->seqnum, &path->addr_text);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	231
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	232 return path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	233 }
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	236 ngx_quic_path_t *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	237 ngx_quic_find_path(ngx_connection_t c, struct sockaddr sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	238 socklen_t socklen)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	239 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	240 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	241 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	242 ngx_quic_connection_t *qc;
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 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	245
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	246 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	247 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	248 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	249 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	250 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	251
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	252 if (ngx_cmp_sockaddr(sockaddr, socklen,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	253 path->sockaddr, path->socklen, 1)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	254 == NGX_OK)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	255 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	256 return path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	257 }
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	260 return NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	261 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	262
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	263
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	264 ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	265 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	266 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	267 off_t len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	268 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	269 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	270 ngx_quic_client_id_t *cid;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	271 ngx_quic_connection_t *qc;
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 qsock = ngx_quic_get_socket(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	274
8917 bb1d1d9d76e2 QUIC: removed excessive check. Vladimir Homutov <vl@nginx.com> parents: 8913 diff changeset	275 if (c->udp->dgram == NULL) {
8913 40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	276 /* 1st ever packet in connection, path already exists */
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	277 path = qsock->path;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	278 goto update;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	281 path = ngx_quic_find_path(c, c->udp->dgram->sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	282 c->udp->dgram->socklen);
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 (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	285 path = ngx_quic_add_path(c, c->udp->dgram->sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	286 c->udp->dgram->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	287 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	288 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	289 }
8913 40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	290
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	291 if (qsock->path) {
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	292 /* NAT rebinding case: packet to same CID, but from new address */
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	293
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	294 ngx_quic_unref_path(c, qsock->path);
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	295
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	296 qsock->path = path;
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	297 path->refcnt++;
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	298
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	299 goto update;
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	300 }
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	301
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	302 } else if (qsock->path) {
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	303 goto update;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	304 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	305
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	306 /* prefer unused client IDs if available */
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	307 cid = ngx_quic_next_client_id(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	308 if (cid == NULL) {
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	309
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	310 /* 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	311 cid = ngx_quic_used_client_id(c, path);
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	312 if (cid == NULL) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	313
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	314 qc = ngx_quic_get_connection(c);
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	315 qc->error = NGX_QUIC_ERR_CONNECTION_ID_LIMIT_ERROR;
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	316 qc->error_reason = "no available client ids for new path";
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	317
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	318 ngx_log_error(NGX_LOG_ERR, c->log, 0,
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	319 "no available client ids for new path");
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	320
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	321 return NGX_ERROR;
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	322 }
8763 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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	325 ngx_quic_connect(c, qsock, path, cid);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	326
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	327 update:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	328
8912 50d73bf20e73 QUIC: refactored multiple QUIC packets handling. Vladimir Homutov <vl@nginx.com> parents: 8901 diff changeset	329 len = pkt->raw->last - pkt->raw->start;
8763 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 /* TODO: this may be too late in some cases;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	332 * for example, if error happens during decrypt(), we cannot
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	333 * send CC, if error happens in 1st packet, due to amplification
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	334 * limit, because path->received = 0
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 * should we account garbage as received or only decrypting packets?
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	337 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	338 path->received += len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	339
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	340 ngx_log_debug6(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	341 "quic packet via #%uL:%uL:%uL"
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	342 " size:%O path recvd:%O sent:%O",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	343 qsock->sid.seqnum, qsock->cid->seqnum, path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	344 len, path->received, path->sent);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	345
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	346 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	347 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	348
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	349
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	350 static void
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	351 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	352 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	353 size_t len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	354
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	355 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	356 c->socklen = path->socklen;
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 if (c->addr_text.data) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	359 len = ngx_min(c->addr_text.len, path->addr_text.len);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	360
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	361 ngx_memcpy(c->addr_text.data, path->addr_text.data, len);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	362 c->addr_text.len = len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	363 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	364
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	365 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	366 "quic send path set to #%uL addr:%V",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	367 path->seqnum, &path->addr_text);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	368 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	369
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	370
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	371 ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	372 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	373 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	374 ngx_quic_path_t *next;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	375 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	376 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	377 ngx_quic_connection_t *qc;
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 /* got non-probing packet via non-active socket with different path */
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 qc = ngx_quic_get_connection(c);
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 /* current socket, different from active */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	384 qsock = ngx_quic_get_socket(c);
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 next = qsock->path; /* going to migrate to this path... */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	387
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	388 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	389 "quic migration from #%uL:%uL:%uL (%s)"
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	390 " to #%uL:%uL:%uL (%s)",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	391 qc->socket->sid.seqnum, qc->socket->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	392 qc->socket->path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	393 ngx_quic_path_state_str(qc->socket->path),
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	394 qsock->sid.seqnum, qsock->cid->seqnum, next->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	395 ngx_quic_path_state_str(next));
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 switch (next->state) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	398 case NGX_QUIC_PATH_NEW:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	399 if (ngx_quic_validate_path(c, qsock) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	400 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	401 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	402 break;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	403
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	404 /* migration to previously known path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	405
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	406 case NGX_QUIC_PATH_VALIDATING:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	407 /* alredy validating, nothing to do */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	408 break;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	409
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	410 case NGX_QUIC_PATH_VALIDATED:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	411 /* if path is old enough, revalidate */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	412 if (ngx_time() - next->validated_at > NGX_QUIC_PATH_VALID_TIME) {
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 next->state = NGX_QUIC_PATH_NEW;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	415
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	416 if (ngx_quic_validate_path(c, qsock) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	417 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	418 }
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	421 break;
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 ctx = ngx_quic_get_send_ctx(qc, pkt->level);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	425
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	426 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	427 * RFC 9000, 9.3. Responding to Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	428 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	429 * 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	430 * response to the highest-numbered non-probing packet.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	431 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	432 if (pkt->pn != ctx->largest_pn) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	433 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	434 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	435
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	436 /* switching connection to new path */
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 ngx_quic_set_connection_path(c, next);
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 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	441 * RFC 9000, 9.5. Privacy Implications of Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	442 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	443 * An endpoint MUST NOT reuse a connection ID when sending to
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	444 * more than one destination address.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	445 */
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 /* preserve valid path we are migrating from */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	448 if (qc->socket->path->state == NGX_QUIC_PATH_VALIDATED) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	449
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	450 if (qc->backup) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	451 ngx_quic_close_socket(c, qc->backup);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	452 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	453
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	454 qc->backup = qc->socket;
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 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	457 "quic backup socket is now #%uL:%uL:%uL (%s)",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	458 qc->backup->sid.seqnum, qc->backup->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	459 qc->backup->path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	460 ngx_quic_path_state_str(qc->backup->path));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	461 }
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 qc->socket = qsock;
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 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	466 "quic active socket is now #%uL:%uL:%uL (%s)",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	467 qsock->sid.seqnum, qsock->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	468 qsock->path->seqnum, ngx_quic_path_state_str(qsock->path));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	469
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	470 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	471 }
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	474 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	475 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	476 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	477 ngx_msec_t pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	478 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	479 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	480 ngx_quic_connection_t *qc;
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 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	483
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	484 path = qsock->path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	485
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	486 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	487 "quic initiated validation of new path #%uL",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	488 path->seqnum);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	489
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	490 path->state = NGX_QUIC_PATH_VALIDATING;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	491
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	492 if (RAND_bytes(path->challenge1, 8) != 1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	493 return NGX_ERROR;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	496 if (RAND_bytes(path->challenge2, 8) != 1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	497 return NGX_ERROR;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	500 if (ngx_quic_send_path_challenge(c, path) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	501 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	502 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	503
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	504 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	505 pto = ngx_quic_pto(c, ctx);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	506
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	507 path->expires = ngx_current_msec + pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	508 path->tries = NGX_QUIC_PATH_RETRIES;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	509
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	510 if (!qc->path_validation.timer_set) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	511 ngx_add_timer(&qc->path_validation, pto);
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	514 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	515 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	516
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	517
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	518 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	519 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	520 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	521 ngx_quic_frame_t frame;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	522
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	523 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	524 "quic path #%uL send path challenge tries:%ui",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	525 path->seqnum, path->tries);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	526
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	527 frame.level = ssl_encryption_application;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	528 frame.type = NGX_QUIC_FT_PATH_CHALLENGE;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	529
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	530 ngx_memcpy(frame.u.path_challenge.data, path->challenge1, 8);
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 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	533 * RFC 9000, 8.2.1. Initiating Path Validation
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	534 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	535 * An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	536 * 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	537 * unless the anti-amplification limit for the path does not permit
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	538 * sending a datagram of this size.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	539 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	540
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	541 /* same applies to PATH_RESPONSE frames */
8932 501f28679d56 QUIC: refactored ngx_quic_frame_sendto() function. Vladimir Homutov <vl@nginx.com> parents: 8917 diff changeset	542 if (ngx_quic_frame_sendto(c, &frame, 1200, path) != NGX_OK) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	543 return NGX_ERROR;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	546 ngx_memcpy(frame.u.path_challenge.data, path->challenge2, 8);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	547
8932 501f28679d56 QUIC: refactored ngx_quic_frame_sendto() function. Vladimir Homutov <vl@nginx.com> parents: 8917 diff changeset	548 if (ngx_quic_frame_sendto(c, &frame, 1200, path) != NGX_OK) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	549 return NGX_ERROR;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	552 return NGX_OK;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	556 void
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	557 ngx_quic_path_validation_handler(ngx_event_t *ev)
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 ngx_msec_t now;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	560 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	561 ngx_msec_int_t left, next, pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	562 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	563 ngx_connection_t *c;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	564 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	565 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	566
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	567 c = ev->data;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	568 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	569
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	570 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	571 pto = ngx_quic_pto(c, ctx);
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 next = -1;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	574 now = ngx_current_msec;
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 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	577 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	578 q = ngx_queue_next(q))
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 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	581
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	582 if (path->state != NGX_QUIC_PATH_VALIDATING) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	583 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	584 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	585
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	586 left = path->expires - now;
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 if (left > 0) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	589
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	590 if (next == -1 \|\| left < next) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	591 next = path->expires;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	594 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	595 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	596
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	597 if (--path->tries) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	598 path->expires = ngx_current_msec + pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	599
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	600 if (next == -1 \|\| pto < next) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	601 next = pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	602 }
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 /* retransmit */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	605 (void) ngx_quic_send_path_challenge(c, path);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	606
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	607 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	608 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	609
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	610 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	611 "quic path #%uL validation failed", path->seqnum);
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 /* found expired path */
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 path->state = NGX_QUIC_PATH_NEW;
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 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	618 * RFC 9000, 9.4. Loss Detection and Congestion Control
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	619 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	620 * 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	621 * 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	622 * 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	623 * 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	624 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	625
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	626 if (qc->socket->path != path) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	627 /* the path was not actually used */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	628 continue;
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 if (ngx_quic_path_restore(c) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	632 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	633 qc->error_reason = "no viable path";
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	634 ngx_quic_close_connection(c, NGX_ERROR);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	635 return;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	636 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	637 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	638
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	639 if (next != -1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	640 ngx_add_timer(&qc->path_validation, next);
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 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	643
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 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	646 ngx_quic_path_restore(ngx_connection_t *c)
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 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	649 ngx_quic_connection_t *qc;
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 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	652
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	653 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	654 * RFC 9000, 9.1. Probing a New Path
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	655 *
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	656 * 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	657 *
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	658 * RFC 9000, 9.3.2. On-Path Address Spoofing
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	659 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	660 * To protect the connection from failing due to such a spurious
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	661 * migration, an endpoint MUST revert to using the last validated
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	662 * peer address when validation of a new peer address fails.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	663 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	664
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	665 if (qc->backup == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	666 return NGX_ERROR;
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 qc->socket = qc->backup;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	670 qc->backup = NULL;
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 qsock = qc->socket;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	673
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	674 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	675 "quic active socket is restored to #%uL:%uL:%uL"
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	676 " (%s), no backup",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	677 qsock->sid.seqnum, qsock->cid->seqnum, qsock->path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	678 ngx_quic_path_state_str(qsock->path));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	679
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	680 ngx_quic_set_connection_path(c, qsock->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 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	683 }

Mercurial > hg > nginx

annotate src/event/quic/ngx_event_quic_migration.c @ 8932:501f28679d56 quic