common.py 文件源码

def add_network(self, addr):
        if addr is "":
            return
        block = addr.split('/')
        addr_family = is_ip(block[0])
        addr_len = IPNetwork.ADDRLENGTH[addr_family]
        if addr_family is socket.AF_INET:
            ip, = struct.unpack("!I", socket.inet_aton(block[0]))
        elif addr_family is socket.AF_INET6:
            hi, lo = struct.unpack("!QQ", inet_pton(addr_family, block[0]))
            ip = (hi << 64) | lo
        else:
            raise Exception("Not a valid CIDR notation: %s" % addr)
        if len(block) is 1:
            prefix_size = 0
            while (ip & 1) == 0 and ip is not 0:
                ip >>= 1
                prefix_size += 1
            logging.warn("You did't specify CIDR routing prefix size for %s, "
                         "implicit treated as %s/%d" % (addr, addr, addr_len))
        elif block[1].isdigit() and int(block[1]) <= addr_len:
            prefix_size = addr_len - int(block[1])
            ip >>= prefix_size
        else:
            raise Exception("Not a valid CIDR notation: %s" % addr)
        if addr_family is socket.AF_INET:
            self._network_list_v4.append((ip, prefix_size))
        else:
            self._network_list_v6.append((ip, prefix_size))