38 lines
1.1 KiB
Lua
38 lines
1.1 KiB
Lua
if not verbana then verbana = {} end
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verbana.lib_ip = {}
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function verbana.lib_ip.is_valid_ip(ipstr)
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local a, b, c, d = ipstr:match('^(%d+)%.(%d+)%.(%d+)%.(%d+)$')
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a = tonumber(a)
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b = tonumber(b)
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c = tonumber(c)
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d = tonumber(d)
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if not (a and b and c and d) then return false end
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return 0 <= a and a < 256 and 0 <= b and b < 256 and 0 <= c and c < 256 and 0 <= d and d < 256
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end
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function verbana.lib_ip.ipstr_to_ipint(ipstr)
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local a, b, c, d = ipstr:match('^(%d+)%.(%d+)%.(%d+)%.(%d+)$')
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return (tonumber(a) * 16777216) + (tonumber(b) * 65536) + (tonumber(c) * 256) + tonumber(d)
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end
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function verbana.lib_ip.ipint_to_ipstr(number)
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local d = number % 256
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number = math.floor(number / 256)
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local c = number % 256
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number = math.floor(number / 256)
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local b = number % 256
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local a = math.floor(number / 256)
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return ('%u.%u.%u.%u'):format(a, b, c, d)
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end
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function verbana.lib_ip.netstr_to_bounds(ipnet)
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local ip, net = ipnet:match('^(.*)/(%d+)$')
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local start = verbana.lib_ip.ipstr_to_ipint(ip)
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net = tonumber(net)
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local end_ = start + (2 ^ (32 - net)) - 1
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return start, end_
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end
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