Stream: fixed logging UDP upstream timeout. Previously, when the first UDP response packet was not received from the proxied server within proxy_timeout, no error message was logged before switching to the next upstream. Additionally, when one of succeeding response packets was not received within the timeout, the timeout error had low severity because it was logged as a client connection error as opposed to upstream connection error.

/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


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


int
ngx_nonblocking(ngx_socket_t s)
{
    unsigned long  nb = 1;

    return ioctlsocket(s, FIONBIO, &nb);
}


int
ngx_blocking(ngx_socket_t s)
{
    unsigned long  nb = 0;

    return ioctlsocket(s, FIONBIO, &nb);
}


int
ngx_tcp_push(ngx_socket_t s)
{
    return 0;
}