IP address and subnet mask calculations

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IP address and subnet mask calculations

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Topic

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2007-11-12 : 20:47:09

[code]-- Prepare sample data
DECLARE @Sample TABLE (ID INT, NetworkIP VARCHAR(15), SubnetMask VARCHAR(15))

INSERT @Sample
SELECT 1, '192.168.1.0', '255.255.255.128' UNION ALL
SELECT 2, '10.1.1.64', '255.255.255.240' UNION ALL
SELECT 3, '172.16.11.0', '255.255.255.252'

-- Show the expected output
SELECT ID,
NetworkIP,
SubnetMask,
dbo.fnIsInRangeIP('192.168.1.5', NetworkIP, SubnetMask) AS IsInRange
FROM @Sample[/code]And here is the function code[code]CREATE FUNCTION dbo.fnIsInRangeIP
(
@IP VARCHAR(15),
@NetIP VARCHAR(15),
@MaskIP VARCHAR(15)
)
RETURNS BIT
AS
BEGIN
RETURN CASE
WHEN CAST(PARSENAME(@IP, 4) AS TINYINT) & CAST(PARSENAME(@MaskIP, 4) AS TINYINT) = CAST(PARSENAME(@NetIP, 4) AS TINYINT) & CAST(PARSENAME(@MaskIP, 4) AS TINYINT)
AND CAST(PARSENAME(@IP, 3) AS TINYINT) & CAST(PARSENAME(@MaskIP, 3) AS TINYINT) = CAST(PARSENAME(@NetIP, 3) AS TINYINT) & CAST(PARSENAME(@MaskIP, 3) AS TINYINT)
AND CAST(PARSENAME(@IP, 2) AS TINYINT) & CAST(PARSENAME(@MaskIP, 2) AS TINYINT) = CAST(PARSENAME(@NetIP, 2) AS TINYINT) & CAST(PARSENAME(@MaskIP, 2) AS TINYINT)
AND CAST(PARSENAME(@IP, 1) AS TINYINT) & CAST(PARSENAME(@MaskIP, 1) AS TINYINT) = CAST(PARSENAME(@NetIP, 1) AS TINYINT) & CAST(PARSENAME(@MaskIP, 1) AS TINYINT)
THEN 1
ELSE 0
END
END[/code]

E 12°55'05.25"
N 56°04'39.16"

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2007-11-12 : 22:05:16

[code]SELECT dbo.fnNetworkRangeLowestIP('192.168.1.5', '255.255.255.240')
SELECT dbo.fnNetworkRangeHighestIP('192.168.1.5', '255.255.255.240')[/code]And the code for these[code]CREATE FUNCTION [dbo].[fnNetworkRangeLowestIP]
(
@NetworkIP VARCHAR(15),
@SubnetMask VARCHAR(15)
)
RETURNS VARCHAR(15)
AS
BEGIN
RETURN CAST(CAST(PARSENAME(@NetworkIP, 4) AS TINYINT) & CAST(PARSENAME(@SubnetMask, 4) AS TINYINT) AS VARCHAR(3))
+ '.' + CAST(CAST(PARSENAME(@NetworkIP, 3) AS TINYINT) & CAST(PARSENAME(@SubnetMask, 3) AS TINYINT) AS VARCHAR(3))
+ '.' + CAST(CAST(PARSENAME(@NetworkIP, 2) AS TINYINT) & CAST(PARSENAME(@SubnetMask, 2) AS TINYINT) AS VARCHAR(3))
+ '.' + CAST(CAST(PARSENAME(@NetworkIP, 1) AS TINYINT) & CAST(PARSENAME(@SubnetMask, 1) AS TINYINT) AS VARCHAR(3))
END

CREATE FUNCTION [dbo].[fnNetworkRangeHighestIP]
(
@NetworkIP VARCHAR(15),
@SubnetMask VARCHAR(15)
)
RETURNS VARCHAR(15)
AS
BEGIN
RETURN CAST(CAST(PARSENAME(@NetworkIP, 4) AS TINYINT) | (CAST(PARSENAME(@SubnetMask, 4) AS TINYINT) ^ 0xFF) AS VARCHAR(3))
+ '.' + CAST(CAST(PARSENAME(@NetworkIP, 3) AS TINYINT) | (CAST(PARSENAME(@SubnetMask, 3) AS TINYINT) ^ 0xFF) AS VARCHAR(3))
+ '.' + CAST(CAST(PARSENAME(@NetworkIP, 2) AS TINYINT) | (CAST(PARSENAME(@SubnetMask, 2) AS TINYINT) ^ 0xFF) AS VARCHAR(3))
+ '.' + CAST(CAST(PARSENAME(@NetworkIP, 1) AS TINYINT) | (CAST(PARSENAME(@SubnetMask, 1) AS TINYINT) ^ 0xFF) AS VARCHAR(3))
END[/code]

E 12°55'05.25"
N 56°04'39.16"

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