Mercurial > hg > nginx
view src/event/ngx_event_udp.h @ 9143:48691bab4474
QUIC: fixed probe-congestion deadlock.
When probe timeout expired while congestion window was exhausted, probe PINGs
could not be sent. As a result, lost packets could not be declared lost and
congestion window could not be freed for new packets. This deadlock
continued until connection idle timeout expiration.
Now PINGs are sent separately from the frame queue without congestion control,
as specified by RFC 9002, Section 7:
An endpoint MUST NOT send a packet if it would cause bytes_in_flight
(see Appendix B.2) to be larger than the congestion window, unless the
packet is sent on a PTO timer expiration (see Section 6.2) or when entering
recovery (see Section 7.3.2).
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Mon, 14 Aug 2023 08:28:30 +0400 |
parents | adcc6d8acfd4 |
children |
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/* * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_UDP_H_INCLUDED_ #define _NGX_EVENT_UDP_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #if !(NGX_WIN32) #if ((NGX_HAVE_MSGHDR_MSG_CONTROL) \ && (NGX_HAVE_IP_SENDSRCADDR || NGX_HAVE_IP_RECVDSTADDR \ || NGX_HAVE_IP_PKTINFO \ || (NGX_HAVE_INET6 && NGX_HAVE_IPV6_RECVPKTINFO))) #define NGX_HAVE_ADDRINFO_CMSG 1 #endif struct ngx_udp_connection_s { ngx_rbtree_node_t node; ngx_connection_t *connection; ngx_buf_t *buffer; ngx_str_t key; }; #if (NGX_HAVE_ADDRINFO_CMSG) typedef union { #if (NGX_HAVE_IP_SENDSRCADDR || NGX_HAVE_IP_RECVDSTADDR) struct in_addr addr; #endif #if (NGX_HAVE_IP_PKTINFO) struct in_pktinfo pkt; #endif #if (NGX_HAVE_INET6 && NGX_HAVE_IPV6_RECVPKTINFO) struct in6_pktinfo pkt6; #endif } ngx_addrinfo_t; size_t ngx_set_srcaddr_cmsg(struct cmsghdr *cmsg, struct sockaddr *local_sockaddr); ngx_int_t ngx_get_srcaddr_cmsg(struct cmsghdr *cmsg, struct sockaddr *local_sockaddr); #endif void ngx_event_recvmsg(ngx_event_t *ev); ssize_t ngx_sendmsg(ngx_connection_t *c, struct msghdr *msg, int flags); void ngx_udp_rbtree_insert_value(ngx_rbtree_node_t *temp, ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel); #endif void ngx_delete_udp_connection(void *data); #endif /* _NGX_EVENT_UDP_H_INCLUDED_ */