python ip
优先使用python3(2.7部分新版本)自带的ipaddress库。
def is_ip_in_net(ip, net):
netaddr, masknum = net.split('/')
ipbits = socket.inet_aton(ip)
netbits = socket.inet_aton(net)
iplint=struct.unpack('!I', ipbits)[0]
netlint=struct.unpack('!I', netbits)[0]
host_bit = 32 - int(masknum)
masklint = (0xFFFFFFFF<<host_bit) & 0xFFFFFFFF
return (iplint & masklint) == (netlint & masklint)
def mask_addr2num(maskaddr):
masknum = sum([bin(int(x)).count('1') for x in maskaddr.split('.')])
return str(masknum)
