sockets - How can i find the ips in network in python

Question

How can i find the TCP ips in network with the range(i.e 132.32.0.3 to 132.32.0.44) through python programming and also want to know the which ips are alive and which are dead. please send me.. thanks for the repliers...

Answer 1

Part 1 - "Finding IPs"

Your example range, 132.32.0.3 to 132.32.0.44 doesn't match any subnet, which is curious.

Typically applications for checking whether hosts are up and down are normally scoped within a subnet, e.g. 192.168.0.0/28 (host addresses: 192.168.0.1 to 192.168.0.14).

If you wanted to calculate the addresses within a subnet, I'd suggest you use ipaddr. E.g.:

>>> from ipaddr import IPv4Address, IPNetwork
>>> for a in IPNetwork('192.168.0.0/28').iterhosts():
...   print a
...
192.168.0.1
192.168.0.2
192.168.0.3
192.168.0.4
192.168.0.5
192.168.0.6
192.168.0.7
192.168.0.8
192.168.0.9
192.168.0.10
192.168.0.11
192.168.0.12
192.168.0.13
192.168.0.14

However, if you're sure that you want an arbitrary range. You can convert an IPv4 address to an integer, increment and convert back to dotted IP. E.g.:

def aton(a):
  """
  Change dotted ip address to integer
  e.g. '192.168.0.1' -> 3232235521L
  """
  return reduce(lambda x,y: (x<<8) + y, [ int(x) for x in a.split('.') ])

def ntoa(n):
  """
  Change an integer to a dotted ip address.
  e.g. 3232235522L -> '192.168.0.2'
  """
  return "%d.%d.%d.%d" % (n >> 24,(n & 0xffffff) >> 16,(n & 0xffff) >> 8,(n & 0xff))

def arbitraryRange(a1,a2):
  """
  Generate all IP addresses between two addresses inclusively
  """
  n1, n2 = aton(a1), aton(a2)
  assert n1 < n2
  i = n1
  while i <= n2:
    yield ntoa(i)
    i += 1

Providing:

>>> for a in arbitraryRange('192.168.0.10','192.168.0.20'):
...   print a
...
192.168.0.10
192.168.0.11
192.168.0.12
192.168.0.13
192.168.0.14
192.168.0.15
192.168.0.16
192.168.0.17
192.168.0.18
192.168.0.19
192.168.0.20

---

Part 2 - "Alive or Dead"

The question of "alive" or "dead" is complex and entirely dependent on what you mean by those terms. To provide context and contrast, here's a list of testable qualities with regard to an IP address / host:

• Responds to ARP request?
• Responds to ICMP echo request?
• Responds to TCP SYN?