SQL Function for calculating IP Address

Question

Hi Experts ,
I have an IP Range i need to find out the First Host detail for the IP using a SQL scalar function .
Example : 11.30.10.40
Subnet Mask is 26
Output required
First host: 11.30.10.1
am confused how i can derive the first host  values from a sql function kindly help .
Thanks
Priya

Answer 1

DECLARE @Mask TINYINT = 26;
DECLARE @AddressIP VARCHAR(15)= '11.30.10.40';
DECLARE @AddressValue BIGINT = PARSENAME(@AddressIP,4)*CAST(256*256*256 AS BIGINT)+PARSENAME(@AddressIP,3)*256*256+PARSENAME(@AddressIP,2)*256+PARSENAME(@AddressIP,1);
WITH
n0(n) AS (SELECT 0 UNION ALL SELECT 0)
,n1(n) AS (SELECT 0 FROM n0 a CROSS JOIN n0)
,n2(n) AS (SELECT 0 FROM n1 a CROSS JOIN n1)
,n3(n) AS (SELECT 0 FROM n2 a UNION ALL SELECT 0 g FROM n2)
,t (n) AS (SELECT ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) FROM n3)
,bits(b,v) AS (SELECT n,POWER(CAST(2 AS BIGINT),32-n) FROM t)
SELECT @AddressIP [Address]
,CAST((SUM(v) / 256 / 256 / 256) % 256 AS VARCHAR(3)) + '.' + CAST((SUM(v) / 256 / 256) % 256 AS VARCHAR(3)) + '.' + CAST((SUM(v) / 256) % 256 AS VARCHAR(3)) + '.' + CAST(SUM(v) % 256 AS VARCHAR(3)) [Netmask]
,CAST(((SUM(v) ^ 0xFFFFFFFF) / 256 / 256 / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((SUM(v) ^ 0xFFFFFFFF) / 256 / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((SUM(v) ^ 0xFFFFFFFF) / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((SUM(v) ^ 0xFFFFFFFF)) % 256 AS VARCHAR(3)) [Wildcard]
,CAST(((@AddressValue & SUM(v)) / 256 / 256 / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((@AddressValue & SUM(v)) / 256 / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((@AddressValue & SUM(v)) / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((@AddressValue & SUM(v))) % 256 AS VARCHAR(3)) + '/' + CAST(MAX(b) AS VARCHAR(2)) [NetworkAddress]
,CAST(((((SUM(v) ^ 0xFFFFFFFF)) | @AddressValue) / 256 / 256 / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((((SUM(v) ^ 0xFFFFFFFF)) | @AddressValue) / 256 / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((((SUM(v) ^ 0xFFFFFFFF)) | @AddressValue) / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((((SUM(v) ^ 0xFFFFFFFF)) | @AddressValue)) % 256 AS VARCHAR(3)) [BroadcastAddress]
,CAST(((@AddressValue & SUM(v)) / 256 / 256 / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((@AddressValue & SUM(v)) / 256 / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((@AddressValue & SUM(v)) / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((@AddressValue & SUM(v))) % 256 + 1 AS VARCHAR(3)) [FirstHost]
,CAST(((((SUM(v) ^ 0xFFFFFFFF)) | @AddressValue) / 256 / 256 / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((((SUM(v) ^ 0xFFFFFFFF)) | @AddressValue) / 256 / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((((SUM(v) ^ 0xFFFFFFFF)) | @AddressValue) / 256) % 256 AS VARCHAR(3)) + '.' + CAST(((((SUM(v) ^ 0xFFFFFFFF)) | @AddressValue)) % 256 - 1 AS VARCHAR(3)) [LastHost]
,(((SUM(v) ^ 0xFFFFFFFF)) | @AddressValue) - (@AddressValue & SUM(v)) - 1 [TotalHostCount]
FROM bits WHERE @Mask BETWEEN 1 AND 32 AND b <= @Mask
Jon