source: fedd/deter/ip_addr.py @ bea19b7

#!/usr/local/bin/python

class ip_addr:
    def __init__(self, x):
        if isinstance(x, ip_addr):
            self.ival = x.ival
        elif isinstance(x, int):
            self.ival = x
        elif isinstance(x, long):
            self.ival = (int(x & 0xffffffff))
        elif isinstance(x, basestring):
            self.ival = 0
            sh = 24
            bytes = x.split(".", 4)
            for b in bytes:
                self.ival |= (int(b) << sh)
                sh -= 8
        else:
            self.ival = 0
    
    def __str__(self):
        return "%d.%d.%d.%d" % ((self.ival & 0xff000000) >> 24,
                (self.ival & 0x00ff0000) >> 16, 
                (self.ival & 0x0000ff00) >> 8,
                self.ival & 0x000000ff)

    def __add__(self, i):
        if isinstance(i, int): return ip_addr(self.ival + i)
        elif isinstance(i, ip_addr): return ip_addr(self.ival + i.ival)
        else: raise ValueError("IP addrs must operate on IP addrs or ints")

    def __sub__(self, i):
        if isinstance(i, int): return ip_addr(self.ival - i)
        elif isinstance(i, ip_addr): return ip_addr(self.ival - i.ival)
        else: raise ValueError("IP addrs must operate on IP addrs or ints")

    def __and__(self, i):
        if isinstance(i, int): return ip_addr(self.ival & i)
        elif isinstance(i, ip_addr): return ip_addr(self.ival & i.ival)
        else: raise ValueError("IP addrs must operate on IP addrs or ints")

    def __or__(self, i):
        if isinstance(i, int): return ip_addr(self.ival | i)
        elif isinstance(i, ip_addr): return ip_addr(self.ival | i.ival)
        else: raise ValueError("IP addrs must operate on IP addrs or ints")

    def __xor__(self, i):
        if isinstance(i, int): return ip_addr(self.ival ^ i)
        elif isinstance(i, ip_addr): return ip_addr(self.ival ^ i.ival)
        else: raise ValueError("IP addrs must operate on IP addrs or ints")

    def __radd__(self, i):
        return self.__add__(i)

    def __rsub__(self, i):
        return self.__sub__(i)

    def __rand__(self, i):
        return self.__and__(i)

    def __ror__(self, i):
        return self.__or__(i)

    def __rxor__(self, i):
        return self.__xor__(i)

    def __int__(self):
        return self.ival

    def __oct__(self):
        return oct(self.ival)

    def __hex__(self):
        return hex(self.ival)