hostap/wpaspy/wpaspy.py

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#!/usr/bin/python
#
# wpa_supplicant/hostapd control interface using Python
# Copyright (c) 2013, Jouni Malinen <j@w1.fi>
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.
from __future__ import print_function
import os
import stat
import socket
import select
counter = 0
class Ctrl:
def __init__(self, path, port=9877):
global counter
self.started = False
self.attached = False
self.path = path
self.port = port
try:
mode = os.stat(path).st_mode
if stat.S_ISSOCK(mode):
self.udp = False
else:
self.udp = True
except:
self.udp = True
if not self.udp:
self.s = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
self.dest = path
self.local = "/tmp/wpa_ctrl_" + str(os.getpid()) + '-' + str(counter)
counter += 1
self.s.bind(self.local)
try:
self.s.connect(self.dest)
except Exception as e:
self.s.close()
os.unlink(self.local)
raise
else:
try:
self.s = None
ai_list = socket.getaddrinfo(path, port, socket.AF_INET,
socket.SOCK_DGRAM)
for af, socktype, proto, cn, sockaddr in ai_list:
self.sockaddr = sockaddr
break
self.s = socket.socket(af, socktype)
self.s.settimeout(5)
self.s.sendto("GET_COOKIE", sockaddr)
reply, server = self.s.recvfrom(4096)
self.cookie = reply
self.port = port
except:
print("connect exception ", path, str(port))
if self.s != None:
self.s.close()
raise
self.started = True
def __del__(self):
self.close()
def close(self):
if self.attached:
try:
self.detach()
except Exception as e:
# Need to ignore this allow the socket to be closed
self.attached = False
pass
if self.started:
self.s.close()
if not self.udp:
os.unlink(self.local)
self.started = False
def request(self, cmd, timeout=10):
if self.udp:
self.s.sendto(self.cookie + cmd, self.sockaddr)
else:
self.s.send(cmd)
[r, w, e] = select.select([self.s], [], [], timeout)
if r:
return self.s.recv(4096)
raise Exception("Timeout on waiting response")
def attach(self):
if self.attached:
return None
res = self.request("ATTACH")
if "OK" in res:
self.attached = True
return None
raise Exception("ATTACH failed")
def detach(self):
if not self.attached:
return None
while self.pending():
ev = self.recv()
res = self.request("DETACH")
if "FAIL" not in res:
self.attached = False
return None
raise Exception("DETACH failed")
def terminate(self):
if self.attached:
try:
self.detach()
except Exception as e:
# Need to ignore this to allow the socket to be closed
self.attached = False
self.request("TERMINATE")
self.close()
def pending(self, timeout=0):
[r, w, e] = select.select([self.s], [], [], timeout)
if r:
return True
return False
def recv(self):
res = self.s.recv(4096)
return res