# from https://code.google.com/p/jaccon-ipscanner/source/browse/ipscanner.py
# mod KLL
import os
import time
from subprocess import Popen, PIPE

devnull = open(os.devnull, 'wb')


#print "Jaccon Ping Scan 0.1"
#print "... type enter to continue "
#raw_input()
#str1=raw_input("Enter the ip range ( ex: 192.168.0 ) ")
#KLL i work with one network only
net='192.168.1'
prerr=0 # 0 1 print error lines
sysswitch=0

# _________________________________________________________________
def varinit():
        global sysswitch

        if os.name == 'nt':         # win
            sysswitch=2
            
        if os.name == 'posix':      # RPI linux
            sysswitch=1


# _________________________________________________________________main
varinit()
print "scanning ip range ",net
#print "-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-="

if net == "":
	print "-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=-"
	print "please type your ip range and try again..."
	print "-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-="
	import sys
	sys.exit()


p = [] # ip -> process
act = 0
nrp = 0
err = 0

for n in range(1,255):                      # start ping processes
    ip = net+".%d" % n
    if (sysswitch == 1 ) :                  # linux
        p.append((ip, Popen(['ping', '-c', '3', ip], stdout=devnull)))
    if (sysswitch == 2 ) :                  # win
        result = Popen(['ping', '-n', '1', ip], stdout=PIPE, stderr=PIPE, shell=False)
        outp, errp = result.communicate()
        if (outp.find("TTL") >=0 ) :
            print 'Ip: %s active' % (ip)
            act += 1
        elif (outp.find("unreachable") >=0 ) :
            nrp += 1
        else:                               #like timeout...
            err += 1
        p.append((ip, result))

while p:
    for i, (ip, proc) in enumerate(p[:]):
        if proc.poll() is not None:         # ping finished
            p.remove((ip, proc))            # this makes it O(n**2)
            #print proc.returncode
            if (sysswitch == 1 ) :
                if proc.returncode == 0:
                    print('%s active' % ip)
                    act = act + 1
                elif proc.returncode == 2:
                    print('%s no response' % ip)
                    nrp = nrp + 1
                else:
                    if ( prerr == 1 ) :     # KLL short list
                        print '%s error, code: %s' % (ip,proc.returncode)
                    err = err + 1
    time.sleep(.04)
devnull.close()

#print ""
#print "IPSCAN PYTHON . powered by @jaccon"
#print ""
#import os
#print "Current OS:",os.name
print "OS: %s, Network %s, status active: %s, error: %s, norespones: %s" % ( os.name,net,act,err,nrp )
#print "Active ips [ ",act," ]"
#print "Error ips [ ",err," ]"
#print "No response [ ",nrp," ]"
#print ""
#print "Good bye!"