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libs/core: Taught luci.ip how to use netmasks and smaller syntax sugars

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This commit is contained in:
Steven Barth 2008-08-07 15:09:29 +00:00
parent 77ef326e77
commit 256ab6b57c
1 changed files with 38 additions and 7 deletions
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45
libs/core/luasrc/ip.lua
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@ -74,11 +74,15 @@ ntohs = htons
ntohl = htonl ntohl = htonl
function IPv4(address) function IPv4(address, netmask)
address = address or "0.0.0.0/0"
local data = {} local data = {}
local prefix = address:match("/(.+)") local prefix = address:match("/(.+)")
if prefix then if netmask then
prefix = IPv4():prefix(netmask)
elseif prefix then
address = address:gsub("/.+","") address = address:gsub("/.+","")
prefix = tonumber(prefix) prefix = tonumber(prefix)
if not prefix or prefix < 0 or prefix > 32 then return nil end if not prefix or prefix < 0 or prefix > 32 then return nil end
@ -86,7 +90,7 @@ function IPv4(address)
prefix = 32 prefix = 32
end end
local b1, b2, b3, b4 = address:match("(%d+)%.(%d+)%.(%d+)%.(%d+)") local b1, b2, b3, b4 = address:match("^(%d+)%.(%d+)%.(%d+)%.(%d+)$")
b1 = tonumber(b1) b1 = tonumber(b1)
b2 = tonumber(b2) b2 = tonumber(b2)
@ -106,11 +110,15 @@ function IPv4(address)
end end
end end
function IPv6(address) function IPv6(address, netmask)
address = address or "::/0"
local data = {} local data = {}
local prefix = address:match("/(.+)") local prefix = address:match("/(.+)")
if prefix then if netmask then
prefix = IPv6():prefix(netmask)
elseif prefix then
address = address:gsub("/.+","") address = address:gsub("/.+","")
prefix = tonumber(prefix) prefix = tonumber(prefix)
if not prefix or prefix < 0 or prefix > 128 then return nil end if not prefix or prefix < 0 or prefix > 128 then return nil end
@ -238,8 +246,31 @@ function cidr.equal( self, addr )
return true return true
end end
function cidr.prefix( self ) function cidr.prefix( self, mask )
return self[3] local prefix = self[3]
if mask then
prefix = 0
local obj = self:is4() and IPv4(mask) or IPv6(mask)
if not obj then
return nil
end
for i, block in ipairs(obj[2]) do
local pos = bit.lshift(1, 15)
for i=15, 0, -1 do
if bit.band(block, pos) == pos then
prefix = prefix + 1
else
return prefix
end
pos = bit.rshift(pos, 1)
end
end
end
return prefix
end end
function cidr.network( self ) function cidr.network( self )