nginx: src/event/quic/ngx_event_quic

annotate src/event/quic/ngx_event_quic_migration.c @ 8778:5186ee5a94b9 quic

QUIC: simplified sending 1-RTT only frames.

author	Sergey Kandaurov <pluknet@nginx.com>
date	Wed, 05 May 2021 19:32:49 +0300
parents	d5f93733c17d
children	4715f3e669f1

rev	line source
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	1
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	2 /*
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	3 * Copyright (C) Nginx, Inc.
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	4 */
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	5
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	6
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	7 #include <ngx_config.h>
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	8 #include <ngx_core.h>
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	9 #include <ngx_event.h>
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	10 #include <ngx_event_quic_connection.h>
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	11
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	12
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	13 static void ngx_quic_set_connection_path(ngx_connection_t *c,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	14 ngx_quic_path_t *path);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	15 static ngx_int_t ngx_quic_validate_path(ngx_connection_t *c,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	16 ngx_quic_socket_t *qsock);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	17 static ngx_int_t ngx_quic_send_path_challenge(ngx_connection_t *c,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	18 ngx_quic_path_t *path);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	19 static ngx_int_t ngx_quic_path_restore(ngx_connection_t *c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	20 static ngx_quic_path_t ngx_quic_alloc_path(ngx_connection_t c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	21
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	22
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	23 ngx_int_t
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	24 ngx_quic_handle_path_challenge_frame(ngx_connection_t *c,
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	25 ngx_quic_path_challenge_frame_t *f)
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	26 {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	27 off_t max, pad;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	28 ssize_t sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	29 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	30 ngx_quic_frame_t frame, *fp;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	31 ngx_quic_socket_t *qsock;
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	32 ngx_quic_connection_t *qc;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	33
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	34 qc = ngx_quic_get_connection(c);
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	35
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	36 frame.level = ssl_encryption_application;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	37 frame.type = NGX_QUIC_FT_PATH_RESPONSE;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	38 frame.u.path_response = *f;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	39
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	40 /*
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	42 * PATH_CHALLENGE was received.
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 /*
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	48 * An endpoint MUST NOT expand the datagram containing the PATH_RESPONSE
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	49 * if the resulting data exceeds the anti-amplification limit.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	50 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	51 max = path->received * 3;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	52 max = (path->sent >= max) ? 0 : max - path->sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	53 pad = ngx_min(1200, max);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	54
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	55 sent = ngx_quic_frame_sendto(c, &frame, pad, path->sockaddr, path->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	56 if (sent == -1) {
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	57 return NGX_ERROR;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	58 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	59
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	60 path->sent += sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	61
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	62 if (qsock == qc->socket) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	63 /*
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	64 * 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	65 * send a non-probing packet in response.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	66 */
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	67
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	68 fp = ngx_quic_alloc_frame(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	69 if (fp == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	70 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	71 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	72
8778 5186ee5a94b9 QUIC: simplified sending 1-RTT only frames. Sergey Kandaurov <pluknet@nginx.com> parents: 8777 diff changeset	73 fp->level = ssl_encryption_application;
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	74 fp->type = NGX_QUIC_FT_PING;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	75
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	76 ngx_quic_queue_frame(qc, fp);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	77 }
8737 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 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	80 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	81
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	82
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	83 ngx_int_t
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	84 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	85 ngx_quic_path_challenge_frame_t *f)
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	86 {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	87 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	88 ngx_quic_path_t path, prev;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	89 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	90
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	91 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	92
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 * 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	95 * on which the PATH_CHALLENGE was sent.
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	98 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	99 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	100 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	101 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	102 path = ngx_queue_data(q, ngx_quic_path_t, queue);
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 if (path->state != NGX_QUIC_PATH_VALIDATING) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	105 continue;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	108 if (ngx_memcmp(path->challenge1, f->data, sizeof(f->data)) == 0
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	109 \|\| ngx_memcmp(path->challenge2, f->data, sizeof(f->data)) == 0)
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 goto valid;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	115 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	116 "quic stale PATH_RESPONSE ignored");
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	117
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	118 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	119
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	120 valid:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	121
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	122 /*
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	123 * On confirming a peer's ownership of its new address,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	124 * an endpoint MUST immediately reset the congestion controller
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	125 * and round-trip time estimator for the new path
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	126 * to initial values
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	127 * ...unless the only change in the peer's address is its port number.
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 /*
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_check_migration(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 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	268 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	269 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	270
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	271 qc = ngx_quic_get_connection(c);
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	275 if (c->udp->dgram == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	276 /* 2nd QUIC packet in first UDP datagram */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	277 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	278 }
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 path = ngx_quic_find_path(c, c->udp->dgram->sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	281 c->udp->dgram->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	282 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	283 /* packet comes from unknown path, possibly migration */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	284
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	285 if (qc->tp.disable_active_migration) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	286 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	287 "quic migration disabled, dropping packet "
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	288 "from unknown path");
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	289 return NGX_DECLINED;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	290 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	291
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	292 if (pkt->level != ssl_encryption_application) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	293 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	294 "quic too early migration attempt");
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	295 return NGX_DECLINED;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	296 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	297
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	298 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	299 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	300
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	301 /* packet from known path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	302
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	303 if (qsock->path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	304 /* client switched to previously unused server id */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	305 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	306 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	307
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	308 if (path == qsock->path) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	309 /* regular packet to expected path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	310 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	311 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	312
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	313 /* client is trying to use server id already used on other path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	314
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	315 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	316 "quic attempt to use socket #%uL:%uL:%uL with path #%uL",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	317 qsock->sid.seqnum, qsock->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	318 qsock->path->seqnum, path->seqnum);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	319
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	320 return NGX_DECLINED;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	321 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	322
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	323
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	324 ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	325 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	326 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	327 off_t len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	328 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	329 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	330 ngx_quic_client_id_t *cid;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	331 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	332
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	333 qsock = ngx_quic_get_socket(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	334 path = qsock->path;
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 if (path) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	337 goto update;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	338 }
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 path = ngx_quic_find_path(c, c->udp->dgram->sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	341 c->udp->dgram->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	342
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	343 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	344 path = ngx_quic_add_path(c, c->udp->dgram->sockaddr,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	345 c->udp->dgram->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	346 if (path == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	347 return NGX_ERROR;
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 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	350
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	351 /* prefer unused client IDs if available */
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	352 cid = ngx_quic_next_client_id(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	353 if (cid == NULL) {
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	354
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	355 /* 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	356 cid = ngx_quic_used_client_id(c, path);
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	357 if (cid == NULL) {
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	358
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	359 qc = ngx_quic_get_connection(c);
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	360 qc->error = NGX_QUIC_ERR_CONNECTION_ID_LIMIT_ERROR;
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	361 qc->error_reason = "no available client ids for new path";
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	362
8777 d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	363 ngx_log_error(NGX_LOG_ERR, c->log, 0,
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	364 "no available client ids for new path");
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	365
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	366 return NGX_ERROR;
d5f93733c17d QUIC: relaxed client id requirements. Vladimir Homutov <vl@nginx.com> parents: 8763 diff changeset	367 }
8763 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 ngx_quic_connect(c, qsock, path, cid);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	371
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	372 update:
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 if (pkt->raw->start == pkt->data) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	375 len = pkt->raw->last - pkt->raw->start;
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 } else {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	378 len = 0;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	379 }
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 /* TODO: this may be too late in some cases;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	382 * for example, if error happens during decrypt(), we cannot
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	383 * send CC, if error happens in 1st packet, due to amplification
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	384 * limit, because path->received = 0
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 * should we account garbage as received or only decrypting packets?
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 path->received += len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	389
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	390 ngx_log_debug6(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	391 "quic packet via #%uL:%uL:%uL"
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	392 " size:%O path recvd:%O sent:%O",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	393 qsock->sid.seqnum, qsock->cid->seqnum, path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	394 len, path->received, path->sent);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	395
8737 76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	396 return NGX_OK;
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	397 }
76f476ce4d31 QUIC: distinct files for connection migration. Vladimir Homutov <vl@nginx.com> parents: diff changeset	398
8763 4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	399
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	400 static void
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	401 ngx_quic_set_connection_path(ngx_connection_t c, ngx_quic_path_t path)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	402 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	403 size_t len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	404
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	405 ngx_memcpy(c->sockaddr, path->sockaddr, path->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	406 c->socklen = path->socklen;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	407
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	408 if (c->addr_text.data) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	409 len = ngx_min(c->addr_text.len, path->addr_text.len);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	410
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	411 ngx_memcpy(c->addr_text.data, path->addr_text.data, len);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	412 c->addr_text.len = len;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	413 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	414
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	415 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	416 "quic send path set to #%uL addr:%V",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	417 path->seqnum, &path->addr_text);
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 ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	422 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	423 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	424 ngx_quic_path_t *next;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	425 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	426 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	427 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	428
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	429 /* got non-probing packet via non-active socket with different path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	430
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	431 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	432
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	433 /* current socket, different from active */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	434 qsock = ngx_quic_get_socket(c);
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 next = qsock->path; /* going to migrate to this 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_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	439 "quic migration from #%uL:%uL:%uL (%s)"
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	440 " to #%uL:%uL:%uL (%s)",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	441 qc->socket->sid.seqnum, qc->socket->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	442 qc->socket->path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	443 ngx_quic_path_state_str(qc->socket->path),
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	444 qsock->sid.seqnum, qsock->cid->seqnum, next->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	445 ngx_quic_path_state_str(next));
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 switch (next->state) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	448 case NGX_QUIC_PATH_NEW:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	449 if (ngx_quic_validate_path(c, qsock) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	450 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	451 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	452 break;
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 /* migration to previously known path */
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 case NGX_QUIC_PATH_VALIDATING:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	457 /* alredy validating, nothing to do */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	458 break;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	459
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	460 case NGX_QUIC_PATH_VALIDATED:
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	461 /* if path is old enough, revalidate */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	462 if (ngx_time() - next->validated_at > NGX_QUIC_PATH_VALID_TIME) {
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 next->state = NGX_QUIC_PATH_NEW;
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 if (ngx_quic_validate_path(c, qsock) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	467 return NGX_ERROR;
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 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	470
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	471 break;
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 ctx = ngx_quic_get_send_ctx(qc, pkt->level);
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 /*
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	477 * 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	478 * response to the highest-numbered non-probing packet.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	479 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	480 if (pkt->pn != ctx->largest_pn) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	481 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	482 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	483
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	484 /* switching connection to new 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_quic_set_connection_path(c, next);
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 /*
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	489 * An endpoint MUST NOT reuse a connection ID when sending to
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	490 * more than one destination address.
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	493 /* preserve valid path we are migrating from */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	494 if (qc->socket->path->state == NGX_QUIC_PATH_VALIDATED) {
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 (qc->backup) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	497 ngx_quic_close_socket(c, qc->backup);
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 qc->backup = qc->socket;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	501
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	502 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	503 "quic backup socket is now #%uL:%uL:%uL (%s)",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	504 qc->backup->sid.seqnum, qc->backup->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	505 qc->backup->path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	506 ngx_quic_path_state_str(qc->backup->path));
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 qc->socket = qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	510
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	511 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	512 "quic active socket is now #%uL:%uL:%uL (%s)",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	513 qsock->sid.seqnum, qsock->cid->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	514 qsock->path->seqnum, ngx_quic_path_state_str(qsock->path));
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 return NGX_OK;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	519
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	520 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	521 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	522 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	523 ngx_msec_t pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	524 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	525 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	526 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	527
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	528 qc = ngx_quic_get_connection(c);
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 path = qsock->path;
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 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	533 "quic initiated validation of new path #%uL",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	534 path->seqnum);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	535
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	536 path->state = NGX_QUIC_PATH_VALIDATING;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	537
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	538 if (RAND_bytes(path->challenge1, 8) != 1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	539 return NGX_ERROR;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	542 if (RAND_bytes(path->challenge2, 8) != 1) {
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 if (ngx_quic_send_path_challenge(c, path) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	547 return NGX_ERROR;
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 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	551 pto = ngx_quic_pto(c, ctx);
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 path->expires = ngx_current_msec + pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	554 path->tries = NGX_QUIC_PATH_RETRIES;
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 if (!qc->path_validation.timer_set) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	557 ngx_add_timer(&qc->path_validation, pto);
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	560 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	561 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	562
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	563
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	564 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	565 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	566 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	567 off_t max, pad;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	568 ssize_t sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	569 ngx_quic_frame_t frame;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	570
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	571 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	572 "quic path #%uL send path challenge tries:%ui",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	573 path->seqnum, path->tries);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	574
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	575 frame.level = ssl_encryption_application;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	576 frame.type = NGX_QUIC_FT_PATH_CHALLENGE;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	577
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	578 ngx_memcpy(frame.u.path_challenge.data, path->challenge1, 8);
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 /*
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	581 * An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	582 * 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	583 * unless the anti-amplification limit for the path does not permit
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	584 * sending a datagram of this size.
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	587 /* same applies to PATH_RESPONSE frames */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	588
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	589 max = path->received * 3;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	590 max = (path->sent >= max) ? 0 : max - path->sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	591 pad = ngx_min(1200, max);
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 sent = ngx_quic_frame_sendto(c, &frame, pad, path->sockaddr, path->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	594 if (sent == -1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	595 return NGX_ERROR;
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 path->sent += sent;
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 ngx_memcpy(frame.u.path_challenge.data, path->challenge2, 8);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	601
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	602 max = (path->sent >= max) ? 0 : max - path->sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	603 pad = ngx_min(1200, max);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	604
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	605 sent = ngx_quic_frame_sendto(c, &frame, pad, path->sockaddr, path->socklen);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	606 if (sent == -1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	607 return NGX_ERROR;
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 path->sent += sent;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	611
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	612 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	613 }
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	616 void
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	617 ngx_quic_path_validation_handler(ngx_event_t *ev)
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 ngx_msec_t now;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	620 ngx_queue_t *q;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	621 ngx_msec_int_t left, next, pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	622 ngx_quic_path_t *path;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	623 ngx_connection_t *c;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	624 ngx_quic_send_ctx_t *ctx;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	625 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	626
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	627 c = ev->data;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	628 qc = ngx_quic_get_connection(c);
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 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	631 pto = ngx_quic_pto(c, ctx);
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 next = -1;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	634 now = ngx_current_msec;
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 for (q = ngx_queue_head(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	637 q != ngx_queue_sentinel(&qc->paths);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	638 q = ngx_queue_next(q))
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	639 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	640 path = ngx_queue_data(q, ngx_quic_path_t, queue);
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 if (path->state != NGX_QUIC_PATH_VALIDATING) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	643 continue;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	646 left = path->expires - now;
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 if (left > 0) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	649
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	650 if (next == -1 \|\| left < next) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	651 next = path->expires;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	654 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	655 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	656
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	657 if (--path->tries) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	658 path->expires = ngx_current_msec + pto;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	659
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	660 if (next == -1 \|\| pto < next) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	661 next = pto;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	664 /* retransmit */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	665 (void) ngx_quic_send_path_challenge(c, path);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	666
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	667 continue;
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
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	670 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	671 "quic path #%uL validation failed", path->seqnum);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	672
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	673 /* found expired path */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	674
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	675 path->state = NGX_QUIC_PATH_NEW;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	676
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	677 /*
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	678 * If the timer fires before the PATH_RESPONSE is received, the
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	679 * endpoint might send a new PATH_CHALLENGE, and restart the timer for
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	680 * a longer period of time. This timer SHOULD be set as described in
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	681 * 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	682 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	683
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	684 if (qc->socket->path != path) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	685 /* the path was not actually used */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	686 continue;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	687 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	688
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	689 if (ngx_quic_path_restore(c) != NGX_OK) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	690 qc->error = NGX_QUIC_ERR_NO_VIABLE_PATH;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	691 qc->error_reason = "no viable path";
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	692 ngx_quic_close_connection(c, NGX_ERROR);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	693 return;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	694 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	695 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	696
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	697 if (next != -1) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	698 ngx_add_timer(&qc->path_validation, next);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	699 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	700 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	701
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	702
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	703 static ngx_int_t
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	704 ngx_quic_path_restore(ngx_connection_t *c)
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	705 {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	706 ngx_quic_socket_t *qsock;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	707 ngx_quic_connection_t *qc;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	708
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	709 qc = ngx_quic_get_connection(c);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	710
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	711 /* Failure to validate a path does not cause the connection to end */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	712
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	713 /*
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	714 * To protect the connection from failing due to such a spurious
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	715 * migration, an endpoint MUST revert to using the last validated
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	716 * peer address when validation of a new peer address fails.
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	717 */
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	718
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	719 if (qc->backup == NULL) {
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	720 return NGX_ERROR;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	721 }
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	722
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	723 qc->socket = qc->backup;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	724 qc->backup = NULL;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	725
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	726 qsock = qc->socket;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	727
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	728 ngx_log_error(NGX_LOG_INFO, c->log, 0,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	729 "quic active socket is restored to #%uL:%uL:%uL"
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	730 " (%s), no backup",
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	731 qsock->sid.seqnum, qsock->cid->seqnum, qsock->path->seqnum,
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	732 ngx_quic_path_state_str(qsock->path));
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	733
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	734 ngx_quic_set_connection_path(c, qsock->path);
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	735
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	736 return NGX_OK;
4117aa7fa38e QUIC: connection migration. Vladimir Homutov <vl@nginx.com> parents: 8747 diff changeset	737 }

Mercurial > hg > nginx

annotate src/event/quic/ngx_event_quic_migration.c @ 8778:5186ee5a94b9 quic