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view src/event/quic/ngx_event_quic_output.h @ 9189:fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
By default packets with these frames are expanded to 1200 bytes. Previously,
if anti-amplification limit did not allow this expansion, it was limited to
whatever size was allowed. However RFC 9000 clearly states no partial
expansion should happen in both cases.
Section 8.2.1. Initiating Path Validation:
An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame
to at least the smallest allowed maximum datagram size of 1200 bytes,
unless the anti-amplification limit for the path does not permit
sending a datagram of this size.
Section 8.2.2. Path Validation Responses:
An endpoint MUST expand datagrams that contain a PATH_RESPONSE frame
to at least the smallest allowed maximum datagram size of 1200 bytes.
...
However, an endpoint MUST NOT expand the datagram containing the
PATH_RESPONSE if the resulting data exceeds the anti-amplification limit.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Wed, 29 Nov 2023 18:13:25 +0400 |
parents | 58afcd72446f |
children |
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/* * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_QUIC_OUTPUT_H_INCLUDED_ #define _NGX_EVENT_QUIC_OUTPUT_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> ngx_int_t ngx_quic_output(ngx_connection_t *c); ngx_int_t ngx_quic_negotiate_version(ngx_connection_t *c, ngx_quic_header_t *inpkt); ngx_int_t ngx_quic_send_stateless_reset(ngx_connection_t *c, ngx_quic_conf_t *conf, ngx_quic_header_t *pkt); ngx_int_t ngx_quic_send_cc(ngx_connection_t *c); ngx_int_t ngx_quic_send_early_cc(ngx_connection_t *c, ngx_quic_header_t *inpkt, ngx_uint_t err, const char *reason); ngx_int_t ngx_quic_send_retry(ngx_connection_t *c, ngx_quic_conf_t *conf, ngx_quic_header_t *pkt); ngx_int_t ngx_quic_send_new_token(ngx_connection_t *c, ngx_quic_path_t *path); ngx_int_t ngx_quic_send_ack(ngx_connection_t *c, ngx_quic_send_ctx_t *ctx); ngx_int_t ngx_quic_send_ack_range(ngx_connection_t *c, ngx_quic_send_ctx_t *ctx, uint64_t smallest, uint64_t largest); ngx_int_t ngx_quic_frame_sendto(ngx_connection_t *c, ngx_quic_frame_t *frame, size_t min, ngx_quic_path_t *path); size_t ngx_quic_path_limit(ngx_connection_t *c, ngx_quic_path_t *path, size_t size); #endif /* _NGX_EVENT_QUIC_OUTPUT_H_INCLUDED_ */