#942 filter out link local address broadcasting

[zarmin]

https://redmine.monaca.io/issues/942

[knight9999]

Thanks for the PR.

Please don't use hard coded IP address (i.e. ' var LINK_LOCAL_ADDRESS_PREFIX = '169.254.';').
Instead of this, please use CONFIG_FILE defined in

monaca-lib/src/monaca.js

Line 42 in 766ace8

var CONFIG_FILE = path.join(USER_CORDOVA, 'monaca_config.json');

Please get the filtering IP address from CONFIG_FILE and use it if the address is defined.
The config file is simple json file named monaca_config.json in /YourHome/.cordova/monaca_config.json.
For example, monaca_config.json should be like

{
 "http_proxy": "",
 "update_check_time": "1519962109517"
 "ignore_broadcast": ["111.222.333.444", "123.456.789.012" ]
}

[zarmin]

It is an implementation scoped thing, rather than a configuration one.

The link-local address range is listed in an official RFC, https://tools.ietf.org/html/rfc3927 .
On newer MacOS (last few years) versions broadcasting is forbidden on link-local networks for unprivileged applications (even if the network interface has a BROADCAST flag on always).
So it's quite pointless to allow the user to configure it freely.

I can make it more generic, but it might be better to put it in the src/config.json.