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#!/usr/bin/python
"""net_monitor: wifi monitoring"""
# native librari implements a few bits
import _native
import socket
import fcntl
import struct
import traceback
import array
class Wireless:
# based on http://svn.pardus.org.tr/pardus/tags/pardus-1.0/system/base/wireless-tools/comar/link.py
# wireless IOCTL constants
SIOCGIWMODE = 0x8B07 # get operation mode
SIOCGIWRATE = 0x8B21 # get default bit rate
SIOCGIWESSID = 0x8B1B # get essid
# wireless modes
modes = ['Auto', 'Ad-Hoc', 'Managed', 'Master', 'Repeat', 'Second', 'Monitor']
def __init__(self):
self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
def ioctl(self, func, params):
return fcntl.ioctl(self.sock.fileno(), func, params)
def get_max_quality(self, iface):
"""Gets maximum quality value"""
return _native.wifi_get_max_quality(iface)
def call(self, iface, func, arg=None):
if not arg:
data = (iface + '\0' * 32)[:32]
else:
data = (iface + '\0' * 16)[:16] + arg
try:
res = self.ioctl(func, data)
return res
except:
traceback.print_exc()
return None
def get_essid(self, iface):
"""Get current essid for an interface"""
buffer = array.array('c', '\0' * 16)
addr, length = buffer.buffer_info()
arg = struct.pack('Pi', addr, length)
self.call(iface, self.SIOCGIWESSID, arg)
return buffer.tostring().strip('\0')
def get_mode(self, iface):
"""Get current mode from an interface"""
result = self.call(iface, self.SIOCGIWMODE)
mode = struct.unpack("i", result[16:20])[0]
return self.modes[mode]
def get_bitrate(self, iface):
"""Gets current operating rate from an interface"""
# Note: KILO is not 2^10 in wireless tools world
result = self.call(iface, self.SIOCGIWRATE)
if result:
size = struct.calcsize('ihbb')
m, e, i, pad = struct.unpack('ihbb', result[16:16+size])
if e == 0:
bitrate = m
else:
bitrate = float(m) * 10**e
return bitrate
else:
return -1
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