Mercurial > hg > nginx-quic
view src/os/unix/ngx_os.h @ 8826:3436b441239b quic
HTTP/3: proper uni stream closure detection.
Previously, closure detection for server-initiated uni streams was not properly
implemented. Instead, HTTP/3 code relied on QUIC code posting the read event
and setting rev->error when it needed to close the stream. Then, regular
uni stream read handler called c->recv() and received error, which closed the
stream. This was an ad-hoc solution. If, for whatever reason, the read
handler was called earlier, c->recv() would return 0, which would also close
the stream.
Now server-initiated uni streams have a separate read event handler for
tracking stream closure. The handler calls c->recv(), which normally returns
0, but may return error in case of closure.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Mon, 31 Jan 2022 09:46:30 +0300 |
parents | 56fc55e32f23 |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_OS_H_INCLUDED_ #define _NGX_OS_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #define NGX_IO_SENDFILE 1 typedef ssize_t (*ngx_recv_pt)(ngx_connection_t *c, u_char *buf, size_t size); typedef ssize_t (*ngx_recv_chain_pt)(ngx_connection_t *c, ngx_chain_t *in, off_t limit); typedef ssize_t (*ngx_send_pt)(ngx_connection_t *c, u_char *buf, size_t size); typedef ngx_chain_t *(*ngx_send_chain_pt)(ngx_connection_t *c, ngx_chain_t *in, off_t limit); typedef struct { ngx_recv_pt recv; ngx_recv_chain_pt recv_chain; ngx_recv_pt udp_recv; ngx_send_pt send; ngx_send_pt udp_send; ngx_send_chain_pt udp_send_chain; ngx_send_chain_pt send_chain; ngx_uint_t flags; } ngx_os_io_t; ngx_int_t ngx_os_init(ngx_log_t *log); void ngx_os_status(ngx_log_t *log); ngx_int_t ngx_os_specific_init(ngx_log_t *log); void ngx_os_specific_status(ngx_log_t *log); ngx_int_t ngx_daemon(ngx_log_t *log); ngx_int_t ngx_os_signal_process(ngx_cycle_t *cycle, char *sig, ngx_pid_t pid); ssize_t ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size); ssize_t ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *entry, off_t limit); ssize_t ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size); ssize_t ngx_unix_send(ngx_connection_t *c, u_char *buf, size_t size); ngx_chain_t *ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit); ssize_t ngx_udp_unix_send(ngx_connection_t *c, u_char *buf, size_t size); ngx_chain_t *ngx_udp_unix_sendmsg_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit); #if (IOV_MAX > 64) #define NGX_IOVS_PREALLOCATE 64 #else #define NGX_IOVS_PREALLOCATE IOV_MAX #endif typedef struct { struct iovec *iovs; ngx_uint_t count; size_t size; ngx_uint_t nalloc; } ngx_iovec_t; ngx_chain_t *ngx_output_chain_to_iovec(ngx_iovec_t *vec, ngx_chain_t *in, size_t limit, ngx_log_t *log); ssize_t ngx_writev(ngx_connection_t *c, ngx_iovec_t *vec); extern ngx_os_io_t ngx_os_io; extern ngx_int_t ngx_ncpu; extern ngx_int_t ngx_max_sockets; extern ngx_uint_t ngx_inherited_nonblocking; extern ngx_uint_t ngx_tcp_nodelay_and_tcp_nopush; #if (NGX_FREEBSD) #include <ngx_freebsd.h> #elif (NGX_LINUX) #include <ngx_linux.h> #elif (NGX_SOLARIS) #include <ngx_solaris.h> #elif (NGX_DARWIN) #include <ngx_darwin.h> #endif #endif /* _NGX_OS_H_INCLUDED_ */