fakehtcnat.py 2.1

#! /usr/bin/python2

# fakehtcnat.py, version 2.1 by invik


import io,socket,subprocess,sys, time

dhcpfile = "/var/state/dhclient/dhclient.leases"
srvrstr = "option dhcp-server-identifier"

print "Waiting for the phone to come up...\n"

# To send things to trash
o = file("/dev/null","w")

# Wait up to 10 seconds waiting for usb0 to show up
i=0
while (i<10):
    rtn = subprocess.call(["/sbin/ifconfig","usb0"], stdout = o, stderr=o)
    if (not rtn): break
    time.sleep(1)
    i += 1

if (rtn):
    print "ERROR: Timeout waiting for usb0 to come up\n"
    sys.exit(1)

# Get a dhcp address
rtn = subprocess.call(["sudo","/usr/sbin/dhclient","usb0"], stdout = o, stderr=o)
if (rtn):
    print "ERROR: not able to get IP from DHCP\n"
    sys.exit(2)

# Check that usb0 is up and has IP
pipeout = subprocess.Popen(["/sbin/ifconfig","usb0"],stdout = subprocess.PIPE,stderr=subprocess.STDOUT)
rtn = pipeout.communicate()[0].find("192.168.99")
if (rtn<0):
    print "ERROR: usb0 is not up or has not IP\n"
    sys.exit(3)

# Read dhcp lease file and get phone's address
f = open(dhcpfile,'r')
d = f.read()
u = d.rfind("interface \"usb0\"")
l = d.find(srvrstr,u)
e = d.find(';',l)
host = d[l+len(srvrstr)+1:e]

print "Phone is up at IP = " + host + "\n"

# Send activation command to phone
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_IP, socket.IP_TTL, 128 )
s.connect((host, 6000))
s.sendall(chr(0) + chr(2) + chr(0) + chr(0))
s.close()

print "Connection signal sent.\n"