Fixed #74699 - Missing range for FILTER_FLAG_NO_RES_RANGE

[andrewnester]

Fix for https://bugs.php.net/bug.php?id=74699

According to IPv4 Multicast Address Space Registry (https://www.iana.org/assignments/multicast-addresses/multicast-addresses.xhtml) IP addresses 224.0.0.0 – 224.0.0.255 are reserved

[tpunt]

This behaviour appears to affect later versions of PHP 7.0 too (see 3v4l), so this PR should target the PHP-7.0 branch.

[andrewnester]

@tpunt Thanks! just retargeted my PR to PHP-7.0 branch

[nikic]

There seems to be some disagreement as to whether or not this is reserved?

[andrewnester]

@nikic I would say that it's better to follow Multicast Address specification in this case. But I suspect that it requires some discussion anyway

[krakjoe]

Could you start that discussion on internals and link back to it here please.

[andrewnester]

@krakjoe here is link to started discussion
http://news.php.net/php.internals/99510

[krakjoe]

@andrewnester bump the discussion on internals, I would ...

@bwoebi @kelunik @DaveRandom do input please

[bwoebi]

Either we ban the whole block of 224.0.0.0/4 because multicast-reserved, or not at all.

At least we do not ban other strictly local net ranges like 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, where RFC 1918 specifies as well that routers should not propagate the address into the public internet; the same restriction this very range also has.

This function seems to generally only apply to addresses reserved for link-local endpoints.
So, I'd say, we should reject this PR, in order to remain consistent with current behavior.

[krakjoe]

Based on the rejection by a member of the group and the fact there has been no activity on this PR or discussion for a long time, I'm going to close this PR.

If I'm wrong to do that, please open a fresh PR and bump that discussion on internals.