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view src/os/unix/ngx_linux_init.c @ 8826:3436b441239b quic

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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
line wrap: on
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#include <ngx_config.h>
#include <ngx_core.h>


u_char  ngx_linux_kern_ostype[50];
u_char  ngx_linux_kern_osrelease[50];


static ngx_os_io_t ngx_linux_io = {
    ngx_unix_recv,
    ngx_readv_chain,
    ngx_udp_unix_recv,
    ngx_unix_send,
    ngx_udp_unix_send,
    ngx_udp_unix_sendmsg_chain,
#if (NGX_HAVE_SENDFILE)
    ngx_linux_sendfile_chain,
    NGX_IO_SENDFILE
#else
    ngx_writev_chain,
    0
#endif
};


ngx_int_t
ngx_os_specific_init(ngx_log_t *log)
{
    struct utsname  u;

    if (uname(&u) == -1) {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "uname() failed");
        return NGX_ERROR;
    }

    (void) ngx_cpystrn(ngx_linux_kern_ostype, (u_char *) u.sysname,
                       sizeof(ngx_linux_kern_ostype));

    (void) ngx_cpystrn(ngx_linux_kern_osrelease, (u_char *) u.release,
                       sizeof(ngx_linux_kern_osrelease));

    ngx_os_io = ngx_linux_io;

    return NGX_OK;
}


void
ngx_os_specific_status(ngx_log_t *log)
{
    ngx_log_error(NGX_LOG_NOTICE, log, 0, "OS: %s %s",
                  ngx_linux_kern_ostype, ngx_linux_kern_osrelease);
}