netblock.py 文件源码

def strtocidr(ips):
    """returns CIDR start + length from string"""
    rng = 32
    pos = string.find(ips, '/')
    if not pos == -1:
        rng = string.atoi(ips[pos+1:])
        ips = ips[:pos]
    if string.find(ips, '.') == -1:
        ip = string.atol(ips)
    else:
        ip = strtoip(ips)
    if rng < 0 or rng > 32:
        raise ValueError, "CIDR length out of range"
    return (ip, rng)