cidr

I need to find out, is ip belong to ip mask. For example: ip = 192.168.0.1 mask = 192.168.0.1/24. I found function that convert ip to mask: inet_cidrtoaddr(int cidr, struct in_addr *addr) { int ocets; if (cidr < 0 || cidr > 32) { errno = EINVAL; return -1; } ocets = (cidr + 7) / 8; addr->s_addr = 0; if (ocets > 0) { memset(&addr->s_addr, 255, (size_t)ocets - 1); memset((unsigned char *)&addr->s_addr + (ocets - 1), (256 - (1 << (32 - cidr) % 8)), 1); } return 0; } How can i compare ip and cidr range ? If you have the IP address, the network address, and the netmask, then you can use a function

Closed. This question is off-topic . It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . Does anyone know of an API / Script which gives me the CIDR for the network of an IP address? Not IP-Range to CIDR! Background: A fraudster registers on my site and use a proxy or a web hoster to hide his IP address or to fake his ip position. Now it makes little sense to just block his IP address. I want to lock the whole network of the hoster for registration. So I need to make a ip whois to get the CIDR of the

This question already has an answer here: Datatype for storing ip address in SQL Server 10 answers I have the following stored procedure that converts IPs to 32-bit binary in TSQL. It works but is EXTREMELY slow (has only converted 8,400 in 40 minutes) - probably because it uses cursors. Does anyone have suggestions and/or a different approach to improve performance? Here's an example: 1.1.79.129 is converted to 00000001.00000001.01001111.10000001 Thanks CREATE PROCEDURE [dbo].[sp_UpdateTableConvertIPToBinary] AS SET NOCOUNT ON declare @IP nvarchar(255) declare IPList cursor for /* Get IP