network.py 文件源码

def netmask(self, interface_name, netmask):
        """
            Checking interface first, if interface name found in Get().interfaces()
            validating Ipv4. After that applied ip address to interace

            interface_name = Applied Interface
            netmask = New netmask ip address
        """
        interface_check = Get().interfaces
        valid_ipv4 = validators.ipv4(netmask)

        if not interface_name in interface_check:
            raise WrongInterfaceName("Wrong Interface Name %s" % interface_name)
        elif not valid_ipv4 is True:
            raise NotValidIPv4Address("Not Valid IPv4 Address %s" % netmask)
        else:
            prefix_len = self.get_net_size(netmask.split('.'))
            ifname = interface_name.encode(encoding='UTF-8')
            netmask = ctypes.c_uint32(~((2 ** (32 - prefix_len)) - 1)).value
            nmbytes = socket.htonl(netmask)
            ifreq = struct.pack('16sH2sI8s', ifname, AF_INET, b'\x00'*2, nmbytes, b'\x00'*8) 
            fcntl.ioctl(self.sock, SIOCSIFNETMASK, ifreq)