[PATCH] make luci.ip.IPvX a bit more forgiving

[reporter]

Here's a small patch which allows for the following:

  ip4 = luci.ip.IPv4("1.2.3.4")
  ip4 = luci.ip.IPv4("::ffff:1.2.3.4")
  ip4 = luci.ip.IPv4("[::ffff:1.2.3.4]")
  ip4 = luci.ip.IPv4("[1.2.3.4]")
  ip6 = luci.ip.IPv6("1::2")
  ip6 = luci.ip.IPv6("[1::2]")

I use this for something like this:

local ip = luci.ip.IPv4(luci.http.getenv("REMOTE_ADDR")):string()
local mac
for _, arp in ipairs(luci.sys.net.arptable()) do
        if arp["IP address"] == ip then
                mac = arp["HW address"]
                break
        end
end

Ie. as a simple way to sanitize IPv4 addresses handed in from external apps which might put the ::ffff: prefix in front (and square brackets around) on IPv6 capable systems.

[jow]

see r5191 and r5192.