#endif

statistic_increment(aborted_connects,&LOCK_status);

DBUG_RETURN(1);

}

/* Connect completed, set read/write timeouts back to default */

my_net_set_read_timeout(net, thd->variables.net_read_timeout);

my_net_set_write_timeout(net, thd->variables.net_write_timeout);

DBUG_RETURN(0);

}

{

    uint connect_errors= 0;

    NET *net= &thd->net;

    ulong pkt_len= 0;

    char *end;

    DBUG_PRINT("info",

    ("New connection received on %s", vio_description(net->vio)));

    #ifdef SIGNAL_WITH_VIO_CLOSE

    thd->set_active_vio(net->vio);

    #endif

    if (!thd->main_security_ctx.host) // If TCP/IP connection

    {

    char ip[30];

    if (vio_peer_addr(net->vio, ip, &thd->peer_port))

    {

    my_error(ER_BAD_HOST_ERROR, MYF(0), thd->main_security_ctx.host_or_ip);

    return 1;

    }

    if (!(thd->main_security_ctx.ip= my_strdup(ip,MYF(MY_WME))))

    return 1; /* The error is set by my_strdup(). */

    thd->main_security_ctx.host_or_ip= thd->main_security_ctx.ip;

    vio_in_addr(net->vio,&thd->remote.sin_addr);

    if (!(specialflag & SPECIAL_NO_RESOLVE))

    {

    vio_in_addr(net->vio,&thd->remote.sin_addr);

    thd->main_security_ctx.host=

    ip_to_hostname(&thd->remote.sin_addr, &connect_errors);

    /* Cut very long hostnames to avoid possible overflows */

    if (thd->main_security_ctx.host)

    {

    if (thd->main_security_ctx.host != my_localhost)

    thd->main_security_ctx.host[min(strlen(thd->main_security_ctx.host),

    HOSTNAME_LENGTH)]= 0;

    thd->main_security_ctx.host_or_ip= thd->main_security_ctx.host;

    }

    if (connect_errors > max_connect_errors)

    {

    my_error(ER_HOST_IS_BLOCKED, MYF(0), thd->main_security_ctx.host_or_ip);

    return 1;

    }

    }

    ...

    if (acl_check_host(thd->main_security_ctx.host, thd->main_security_ctx.ip))//此处验证主机名或IP是否存在