nginx: src/event/quic/ngx_event_quic

annotate src/event/quic/ngx_event_quic_migration.c @ 8939:ddd5e5c0f87d quic

QUIC: improved path validation. Previously, path was considered valid during arbitrary selected 10m timeout since validation. This is quite not what RFC 9000 says; the relevant part is: An endpoint MAY skip validation of a peer address if that address has been seen recently. The patch considers a path to be 'recently seen' if packets were received during idle timeout. If a packet is received from the path that was seen not so recently, such path is considered new, and anti-amplification restrictions apply.

author	Vladimir Homutov <vl@nginx.com>
date	Mon, 13 Dec 2021 17:27:29 +0300
parents	02a9ad88e2df
children	fb41e37ddeb0

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
8933 02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8932 diff changeset	34 ngx_memzero(&frame, sizeof(ngx_quic_frame_t));
02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8932 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 /*
8901 a951e0809044 QUIC: fixed PATH_RESPONSE frame expansion. Vladimir Homutov <vl@nginx.com> parents: 8822 diff changeset	50 * 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	51 * 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	52 */
8932 501f28679d56 QUIC: refactored ngx_quic_frame_sendto() function. Vladimir Homutov <vl@nginx.com> parents: 8917 diff changeset	53 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	54 return NGX_ERROR;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	55 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	56
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	57 if (qsock == qc->socket) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	58 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	59 * RFC 9000, 9.3.3. Off-Path Packet Forwarding
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	60 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	61 * 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	62 * send a non-probing packet in response.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	63 */
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	64
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	65 fp = ngx_quic_alloc_frame(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	66 if (fp == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	67 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	68 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	69
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	70 fp->level = ssl_encryption_application;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	71 fp->type = NGX_QUIC_FT_PING;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	72
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	73 ngx_quic_queue_frame(qc, fp);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	74 }
8737 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 return NGX_OK;
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
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	79
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	80 ngx_int_t
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	81 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	82 ngx_quic_path_challenge_frame_t *f)
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	83 {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	84 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	85 ngx_quic_path_t path, prev;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	86 ngx_quic_connection_t *qc;
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 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	89
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	90 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	91 * RFC 9000, 8.2.3. Successful Path Validation
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	92 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	93 * 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	94 * on which the PATH_CHALLENGE was sent.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	95 */
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 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	98 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	99 q = ngx_queue_next(q))
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 path = ngx_queue_data(q, ngx_quic_path_t, queue);
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 if (path->state != NGX_QUIC_PATH_VALIDATING) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	104 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	105 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	106
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	107 if (ngx_memcmp(path->challenge1, f->data, sizeof(f->data)) == 0
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	108 \|\| ngx_memcmp(path->challenge2, f->data, sizeof(f->data)) == 0)
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 goto valid;
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 }
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 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	115 "quic stale PATH_RESPONSE ignored");
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 return NGX_OK;
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 valid:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	120
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	121 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	122 * RFC 9000, 9.4. Loss Detection and Congestion Control
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	123 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	124 * On confirming a peer's ownership of its new address,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	125 * an endpoint MUST immediately reset the congestion controller
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	126 * 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	127 * 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	128 */
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 prev = qc->backup->path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	131
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	132 if (ngx_cmp_sockaddr(prev->sockaddr, prev->socklen,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	133 path->sockaddr, path->socklen, 0)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	134 != NGX_OK)
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 /* address has changed */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	137 ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t));
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 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	140 ngx_max(2 * qc->tp.max_udp_payload_size,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	141 14720));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	142 qc->congestion.ssthresh = (size_t) -1;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	143 qc->congestion.recovery_start = ngx_current_msec;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	144 }
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 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	147 * RFC 9000, 9.3. Responding to Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	148 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	149 * After verifying a new client address, the server SHOULD
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	150 * send new address validation tokens (Section 8) to the client.
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 if (ngx_quic_send_new_token(c, path) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	154 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	155 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	156
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	157 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	158 "quic path #%uL successfully validated", path->seqnum);
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 path->state = NGX_QUIC_PATH_VALIDATED;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	161
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	162 return NGX_OK;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	166 static ngx_quic_path_t *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	167 ngx_quic_alloc_path(ngx_connection_t *c)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	168 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	169 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	170 struct sockaddr *sa;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	171 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	172 ngx_quic_connection_t *qc;
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 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	175
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	176 if (!ngx_queue_empty(&qc->free_paths)) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	177
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	178 q = ngx_queue_head(&qc->free_paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	179 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	180
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	181 ngx_queue_remove(&path->queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	182
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	183 sa = path->sockaddr;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	184 ngx_memzero(path, sizeof(ngx_quic_path_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	185 path->sockaddr = sa;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	186
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	187 } else {
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 path = ngx_pcalloc(c->pool, sizeof(ngx_quic_path_t));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	190 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	191 return NULL;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	194 path->sockaddr = ngx_palloc(c->pool, NGX_SOCKADDRLEN);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	195 if (path->sockaddr == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	196 return NULL;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	200 return path;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	204 ngx_quic_path_t *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	205 ngx_quic_add_path(ngx_connection_t c, struct sockaddr sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	206 socklen_t socklen)
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 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	209 ngx_quic_connection_t *qc;
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 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	212
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	213 path = ngx_quic_alloc_path(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	214 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	215 return NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	216 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	217
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	218 path->seqnum = qc->path_seqnum++;
8939 ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	219 path->last_seen = ngx_current_msec;
8763 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->socklen = socklen;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	222 ngx_memcpy(path->sockaddr, sockaddr, socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	223
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	224 path->addr_text.data = path->text;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	225 path->addr_text.len = ngx_sock_ntop(sockaddr, socklen, path->text,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	226 NGX_SOCKADDR_STRLEN, 1);
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_queue_insert_tail(&qc->paths, &path->queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	229
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	230 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	231 "quic path #%uL created src:%V",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	232 path->seqnum, &path->addr_text);
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 return path;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	237
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	238 ngx_quic_path_t *
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	239 ngx_quic_find_path(ngx_connection_t c, struct sockaddr sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	240 socklen_t socklen)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	241 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	242 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	243 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	244 ngx_quic_connection_t *qc;
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 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	247
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	248 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	249 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	250 q = ngx_queue_next(q))
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 path = ngx_queue_data(q, ngx_quic_path_t, queue);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	253
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	254 if (ngx_cmp_sockaddr(sockaddr, socklen,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	255 path->sockaddr, path->socklen, 1)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	256 == NGX_OK)
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 return path;
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 }
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 return NULL;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	265
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	266 ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	267 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	268 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	269 off_t len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	270 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	271 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	272 ngx_quic_client_id_t *cid;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	273 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	274
8939 ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	275 qc = ngx_quic_get_connection(c);
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	276 qsock = ngx_quic_get_socket(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	277
8917 bb1d1d9d76e2 QUIC: removed excessive check. Vladimir Homutov <vl@nginx.com> parents: 8913 diff changeset	278 if (c->udp->dgram == NULL) {
8913 40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	279 /* 1st ever packet in connection, path already exists */
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	280 path = qsock->path;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	281 goto update;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	282 }
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 path = ngx_quic_find_path(c, c->udp->dgram->sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	285 c->udp->dgram->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	286
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 path = ngx_quic_add_path(c, c->udp->dgram->sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	289 c->udp->dgram->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	290 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	291 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	292 }
8913 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 if (qsock->path) {
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	295 /* 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	296
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	297 ngx_quic_unref_path(c, qsock->path);
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 qsock->path = path;
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	300 path->refcnt++;
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 goto update;
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	303 }
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	304
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	305 } else if (qsock->path) {
40445fc7c403 QUIC: fixed migration during NAT rebinding. Vladimir Homutov <vl@nginx.com> parents: 8912 diff changeset	306 goto update;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	307 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	308
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	309 /* prefer unused client IDs if available */
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	310 cid = ngx_quic_next_client_id(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	311 if (cid == NULL) {
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	312
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	313 /* 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	314 cid = ngx_quic_used_client_id(c, path);
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	315 if (cid == NULL) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	316
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	317 qc->error = NGX_QUIC_ERR_CONNECTION_ID_LIMIT_ERROR;
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	318 qc->error_reason = "no available client ids for new path";
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	319
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	320 ngx_log_error(NGX_LOG_ERR, c->log, 0,
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	321 "no available client ids for new path");
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	322
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	323 return NGX_ERROR;
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	324 }
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	325 }
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 ngx_quic_connect(c, qsock, path, cid);
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 update:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	330
8939 ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	331 if (path->state != NGX_QUIC_PATH_NEW) {
ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	332 /* force limits/revalidation for paths that were not seen recently */
ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	333 if (ngx_current_msec - path->last_seen > qc->tp.max_idle_timeout) {
ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	334 path->state = NGX_QUIC_PATH_NEW;
ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	335 path->sent = 0;
ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	336 path->received = 0;
ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	337 }
ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	338 }
ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	339
ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	340 path->last_seen = ngx_current_msec;
ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	341
8912 50d73bf20e73 QUIC: refactored multiple QUIC packets handling. Vladimir Homutov <vl@nginx.com> parents: 8901 diff changeset	342 len = pkt->raw->last - pkt->raw->start;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	343
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	344 /* TODO: this may be too late in some cases;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	345 * for example, if error happens during decrypt(), we cannot
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	346 * send CC, if error happens in 1st packet, due to amplification
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	347 * limit, because path->received = 0
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 * should we account garbage as received or only decrypting packets?
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	350 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	351 path->received += len;
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 ngx_log_debug6(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	354 "quic packet via #%uL:%uL:%uL"
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	355 " size:%O path recvd:%O sent:%O",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	356 qsock->sid.seqnum, qsock->cid->seqnum, path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	357 len, path->received, path->sent);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	358
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	359 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	360 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	361
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	362
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	363 static void
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	364 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	365 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	366 size_t len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	367
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	368 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	369 c->socklen = path->socklen;
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 if (c->addr_text.data) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	372 len = ngx_min(c->addr_text.len, path->addr_text.len);
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_memcpy(c->addr_text.data, path->addr_text.data, len);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	375 c->addr_text.len = len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	376 }
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 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	379 "quic send path set to #%uL addr:%V",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	380 path->seqnum, &path->addr_text);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	381 }
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	384 ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	385 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	386 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	387 ngx_quic_path_t *next;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	388 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	389 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	390 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	391
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	392 /* got non-probing packet via non-active socket with different path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	393
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	394 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	395
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	396 /* current socket, different from active */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	397 qsock = ngx_quic_get_socket(c);
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 next = qsock->path; /* going to migrate to this path... */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	400
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	401 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	402 "quic migration from #%uL:%uL:%uL (%s)"
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	403 " to #%uL:%uL:%uL (%s)",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	404 qc->socket->sid.seqnum, qc->socket->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	405 qc->socket->path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	406 ngx_quic_path_state_str(qc->socket->path),
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	407 qsock->sid.seqnum, qsock->cid->seqnum, next->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	408 ngx_quic_path_state_str(next));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	409
8939 ddd5e5c0f87d QUIC: improved path validation. Vladimir Homutov <vl@nginx.com> parents: 8933 diff changeset	410 if (next->state == NGX_QUIC_PATH_NEW) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	411 if (ngx_quic_validate_path(c, qsock) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	412 return NGX_ERROR;
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 }
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 ctx = ngx_quic_get_send_ctx(qc, pkt->level);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	417
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	418 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	419 * RFC 9000, 9.3. Responding to Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	420 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	421 * An endpoint only changes the address to which it sends packets in
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	422 * response to the highest-numbered non-probing packet.
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 if (pkt->pn != ctx->largest_pn) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	425 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	426 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	427
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	428 /* switching connection to new path */
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_quic_set_connection_path(c, next);
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 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	433 * RFC 9000, 9.5. Privacy Implications of Connection Migration
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	434 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	435 * An endpoint MUST NOT reuse a connection ID when sending to
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	436 * more than one destination address.
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	439 /* preserve valid path we are migrating from */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	440 if (qc->socket->path->state == NGX_QUIC_PATH_VALIDATED) {
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 if (qc->backup) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	443 ngx_quic_close_socket(c, qc->backup);
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	446 qc->backup = qc->socket;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	447
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	448 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	449 "quic backup socket is now #%uL:%uL:%uL (%s)",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	450 qc->backup->sid.seqnum, qc->backup->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	451 qc->backup->path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	452 ngx_quic_path_state_str(qc->backup->path));
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	455 qc->socket = qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	456
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	457 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	458 "quic active socket is now #%uL:%uL:%uL (%s)",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	459 qsock->sid.seqnum, qsock->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	460 qsock->path->seqnum, ngx_quic_path_state_str(qsock->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 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	463 }
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	466 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	467 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	468 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	469 ngx_msec_t pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	470 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	471 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	472 ngx_quic_connection_t *qc;
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 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	475
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	476 path = qsock->path;
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 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	479 "quic initiated validation of new path #%uL",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	480 path->seqnum);
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 path->state = NGX_QUIC_PATH_VALIDATING;
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 if (RAND_bytes(path->challenge1, 8) != 1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	485 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	486 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	487
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	488 if (RAND_bytes(path->challenge2, 8) != 1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	489 return NGX_ERROR;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	492 if (ngx_quic_send_path_challenge(c, path) != NGX_OK) {
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 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	497 pto = ngx_quic_pto(c, ctx);
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 path->expires = ngx_current_msec + pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	500 path->tries = NGX_QUIC_PATH_RETRIES;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	501
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	502 if (!qc->path_validation.timer_set) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	503 ngx_add_timer(&qc->path_validation, pto);
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 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	507 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	508
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 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	511 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	512 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	513 ngx_quic_frame_t frame;
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_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	516 "quic path #%uL send path challenge tries:%ui",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	517 path->seqnum, path->tries);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	518
8933 02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8932 diff changeset	519 ngx_memzero(&frame, sizeof(ngx_quic_frame_t));
02a9ad88e2df QUIC: added missing frame initialization. Vladimir Homutov <vl@nginx.com> parents: 8932 diff changeset	520
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	521 frame.level = ssl_encryption_application;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	522 frame.type = NGX_QUIC_FT_PATH_CHALLENGE;
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_memcpy(frame.u.path_challenge.data, path->challenge1, 8);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	525
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	526 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	527 * RFC 9000, 8.2.1. Initiating Path Validation
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	528 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	529 * An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	530 * 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	531 * unless the anti-amplification limit for the path does not permit
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	532 * sending a datagram of this size.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	533 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	534
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	535 /* same applies to PATH_RESPONSE frames */
8932 501f28679d56 QUIC: refactored ngx_quic_frame_sendto() function. Vladimir Homutov <vl@nginx.com> parents: 8917 diff changeset	536 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	537 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	538 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	539
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	540 ngx_memcpy(frame.u.path_challenge.data, path->challenge2, 8);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	541
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 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	547 }
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	550 void
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	551 ngx_quic_path_validation_handler(ngx_event_t *ev)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	552 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	553 ngx_msec_t now;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	554 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	555 ngx_msec_int_t left, next, pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	556 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	557 ngx_connection_t *c;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	558 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	559 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	560
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	561 c = ev->data;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	562 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	563
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	564 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	565 pto = ngx_quic_pto(c, ctx);
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 next = -1;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	568 now = ngx_current_msec;
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 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	571 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	572 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	573 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	574 path = ngx_queue_data(q, ngx_quic_path_t, queue);
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 if (path->state != NGX_QUIC_PATH_VALIDATING) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	577 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	578 }
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 left = path->expires - now;
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 (left > 0) {
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 if (next == -1 \|\| left < next) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	585 next = path->expires;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	586 }
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 continue;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	591 if (--path->tries) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	592 path->expires = ngx_current_msec + pto;
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 if (next == -1 \|\| pto < next) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	595 next = pto;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	598 /* retransmit */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	599 (void) ngx_quic_send_path_challenge(c, path);
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 continue;
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 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	605 "quic path #%uL validation failed", path->seqnum);
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 /* found expired path */
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 path->state = NGX_QUIC_PATH_NEW;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	610
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	611 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	612 * RFC 9000, 9.4. Loss Detection and Congestion Control
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	613 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	614 * 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	615 * 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	616 * 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	617 * 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	618 */
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 if (qc->socket->path != path) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	621 /* the path was not actually used */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	622 continue;
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 if (ngx_quic_path_restore(c) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	626 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	627 qc->error_reason = "no viable path";
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	628 ngx_quic_close_connection(c, NGX_ERROR);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	629 return;
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 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	632
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	633 if (next != -1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	634 ngx_add_timer(&qc->path_validation, next);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	635 }
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 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	640 ngx_quic_path_restore(ngx_connection_t *c)
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 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	643 ngx_quic_connection_t *qc;
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 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	646
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	647 /*
8797 4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	648 * RFC 9000, 9.1. Probing a New Path
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	649 *
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	650 * 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	651 *
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	652 * RFC 9000, 9.3.2. On-Path Address Spoofing
4715f3e669f1 QUIC: updated specification references. Sergey Kandaurov <pluknet@nginx.com> parents: 8778 diff changeset	653 *
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	654 * To protect the connection from failing due to such a spurious
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	655 * migration, an endpoint MUST revert to using the last validated
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	656 * peer address when validation of a new peer address fails.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	657 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	658
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	659 if (qc->backup == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	660 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	661 }
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 qc->socket = qc->backup;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	664 qc->backup = NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	665
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	666 qsock = qc->socket;
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 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	669 "quic active socket is restored to #%uL:%uL:%uL"
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	670 " (%s), no backup",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	671 qsock->sid.seqnum, qsock->cid->seqnum, qsock->path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	672 ngx_quic_path_state_str(qsock->path));
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_quic_set_connection_path(c, qsock->path);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	675
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	676 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	677 }

Mercurial > hg > nginx

annotate src/event/quic/ngx_event_quic_migration.c @ 8939:ddd5e5c0f87d quic