find ip in ip cidr

ip_in_cidr.swift

func ipv4_StringToInt(_ value: String) -> UInt32? {
    var addr = in_addr()
    return inet_aton(value.cString(using: .ascii), &addr) != 0
        ? UInt32(addr.s_addr)
        : nil
}

func ipv4_IntToString(_ value: UInt32) -> String {
    let addr = in_addr(s_addr: value)
    return String(cString:inet_ntoa(addr))
}

public func findIPS(cidrs:[String],iplist:[String]) ->[String]{
    
    var result:[String] = []
    
    iplist.forEach { ip in
        //192.168.1.0/24
        if let raddr = ipv4_StringToInt(ip) {
            for cidr in cidrs {
                let items = cidr.components(separatedBy: "/")
                if items.count == 2 {
                    let r = items[0]
                    let bits = Float(items[1])!
                    if let minaddr = ipv4_StringToInt(r) {
                        let sw = raddr.byteSwapped
                        let min = minaddr.byteSwapped
                        
                        let mask = UInt32((pow(2, 32 - bits ) - 1 ))
                        
                        let maxaddr = min | mask
                        
                        if sw > min && sw < maxaddr {
                            result.append(ip)
                            break
                        }
                    }
                }
            }
        }
       
     // if ip ==
    }
    return result
    
}

let r = findIPS(cidrs: ["192.168.110.0/24"], iplist: ["192.168.110.10","192.168.100.10"])
print(r)