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annotate src/event/quic/ngx_event_quic_migration.h @ 8906:41caf5410110 quic

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QUIC: reject streams which we could not create. The reasons why a stream may not be created by server currently include hitting worker_connections limit and memory allocation error. Previously in these cases the entire QUIC connection was closed and all its streams were shut down. Now the new stream is rejected and existing streams continue working. To reject an HTTP/3 request stream, RESET_STREAM and STOP_SENDING with H3_REQUEST_REJECTED error code are sent to client. HTTP/3 uni streams and Stream streams are not rejected.
author Roman Arutyunyan <arut@nginx.com>
date Thu, 11 Nov 2021 19:07:00 +0300
parents 5186ee5a94b9
children 40445fc7c403
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2 /*
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3 * Copyright (C) Nginx, Inc.
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4 */
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7 #ifndef _NGX_EVENT_QUIC_MIGRATION_H_INCLUDED_
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8 #define _NGX_EVENT_QUIC_MIGRATION_H_INCLUDED_
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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14 #define NGX_QUIC_PATH_RETRIES 3
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15
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16 #define NGX_QUIC_PATH_NEW 0
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17 #define NGX_QUIC_PATH_VALIDATING 1
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18 #define NGX_QUIC_PATH_VALIDATED 2
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19
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20 #define NGX_QUIC_PATH_VALID_TIME 600 /* seconds */
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23 #define ngx_quic_path_state_str(p) \
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24 ((p)->state == NGX_QUIC_PATH_NEW) ? "new" : \
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25 (((p)->state == NGX_QUIC_PATH_VALIDATED) ? "validated" : "validating")
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28 ngx_int_t ngx_quic_handle_path_challenge_frame(ngx_connection_t *c,
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29 ngx_quic_path_challenge_frame_t *f);
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30 ngx_int_t ngx_quic_handle_path_response_frame(ngx_connection_t *c,
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31 ngx_quic_path_challenge_frame_t *f);
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33 ngx_quic_path_t *ngx_quic_add_path(ngx_connection_t *c,
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34 struct sockaddr *sockaddr, socklen_t socklen);
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35
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36 ngx_int_t ngx_quic_check_migration(ngx_connection_t *c,
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37 ngx_quic_header_t *pkt);
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38 ngx_int_t ngx_quic_update_paths(ngx_connection_t *c, ngx_quic_header_t *pkt);
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39 ngx_int_t ngx_quic_handle_migration(ngx_connection_t *c,
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40 ngx_quic_header_t *pkt);
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41
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42 void ngx_quic_path_validation_handler(ngx_event_t *ev);
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43
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44 #endif /* _NGX_EVENT_QUIC_MIGRATION_H_INCLUDED_ */