#! /usr/bin/env python

# Search for IP clients on the current network.

import sys, subprocess, socket, fcntl, struct

def ping(host) :

"""Ping a host by name or address.

return True if it answers, False otherwise.

"""

rv = subprocess.call(["ping", "-q", "-c", "1", "-W", "1", host],

stdout = subprocess.PIPE,

stderr = subprocess.PIPE)

if rv == 0 :

return True

return False

def ip_addr(iface) :

"""Get the IP address of the interface (e.g. eth0)

"""

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

info = fcntl.ioctl(s.fileno(),

0x8915, # SIOCGIFADDR

struct.pack('256s', iface[:15]))

return socket.inet_ntoa(info[20:24])

def search_from(network, start) :

for h in xrange(start, 256) : # Yes, it should adjust based on net class

host = "%s.%d" % (network, h)

if ping(host) :

print host

#else :

# print "No", host

if __name__ == "__main__" :

ip = ip_addr("eth0")

print "My IP is", ip

network = '.'.join(ip.split('.')[0:3])

print "My network is", network

try:

if len(sys.argv) <= 1 :

search_from(network, 1)

else :

for num in sys.argv[1:] :

search_from(network, int(num))

except KeyboardInterrupt:

print "Interrupt"