Remove BWS captcha for whitelisted IPs

remove_bws_captcha.php

/**
 * Check if a given ip is in a network https://gist.github.com/tott/7684443
 * @param  string $ip    IP to check in IPV4 format eg. 127.0.0.1
 * @param  string $range IP/CIDR netmask eg. 127.0.0.0/24, also 127.0.0.1 is accepted and /32 assumed
 * @return boolean true if the ip is in this range / false if not.
 */
function ip_in_range( $ip, $range ) {
	if ( strpos( $range, '/' ) == false ) {
		$range .= '/32';
	}
	// $range is in IP/CIDR format eg 127.0.0.1/24
	list( $range, $netmask ) = explode( '/', $range, 2 );
	$range_decimal = ip2long( $range );
	$ip_decimal = ip2long( $ip );
	$wildcard_decimal = pow( 2, ( 32 - $netmask ) ) - 1;
	$netmask_decimal = ~ $wildcard_decimal;
	return ( ( $ip_decimal & $netmask_decimal ) == ( $range_decimal & $netmask_decimal ) );
}

/**
 * Remove BWS captcha for whitelisted IPs
 * Depends on ip_in_range function
 */
function mysite_captcha_login_whitelist(){
	$captcha_bypass_ips = array(
		'192.168.1.1', # Single IP
		'10.0.0.0/24', # IP range
	);
	foreach ($captcha_bypass_ips as $key => $value) {
		if ( ip_in_range( $_SERVER['REMOTE_ADDR'], $value ) ) {
			remove_action( 'login_form', 'gglcptch_login_display' );
			remove_action( 'authenticate', 'gglcptch_login_check', 21, 1 );
			break;
		}
	}
}
add_action('init', 'mysite_captcha_login_whitelist');