ed14b29f38
os.stat(path) failure is an ambigious indication of the control
interface "path" type (UDP hostname vs. UNIX domain socket path). The
path may be a valid UNIX domain socket path, but that socket could have
been removed just before reaching here. At least the hwsim test case
concurrent_p2pcli managed to hit the "connect exception" print below
from UDP handling even when using a UNIX domain socket.
Work around incorrect determination of control interface socket type by
assuming anything starting with '/' is a UNIX domain socket and not a
hostname.
Fixes: a2c88a8025 ("wpaspy: Add support for UDP connection")
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
149 lines
4.2 KiB
Python
149 lines
4.2 KiB
Python
#!/usr/bin/python
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#
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# wpa_supplicant/hostapd control interface using Python
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# Copyright (c) 2013, Jouni Malinen <j@w1.fi>
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#
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# This software may be distributed under the terms of the BSD license.
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# See README for more details.
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import os
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import stat
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import socket
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import select
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counter = 0
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class Ctrl:
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def __init__(self, path, port=9877):
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global counter
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self.started = False
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self.attached = False
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self.path = path
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self.port = port
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self.udp = False
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if not path.startswith('/'):
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try:
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mode = os.stat(path).st_mode
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if not stat.S_ISSOCK(mode):
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self.udp = True
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except:
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self.udp = True
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if not self.udp:
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self.s = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
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self.dest = path
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self.local = "/tmp/wpa_ctrl_" + str(os.getpid()) + '-' + str(counter)
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counter += 1
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self.s.bind(self.local)
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try:
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self.s.connect(self.dest)
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except Exception as e:
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self.s.close()
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os.unlink(self.local)
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raise
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else:
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try:
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self.s = None
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ai_list = socket.getaddrinfo(path, port, socket.AF_INET,
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socket.SOCK_DGRAM)
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for af, socktype, proto, cn, sockaddr in ai_list:
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self.sockaddr = sockaddr
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break
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self.s = socket.socket(af, socktype)
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self.s.settimeout(5)
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self.s.sendto(b"GET_COOKIE", sockaddr)
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reply, server = self.s.recvfrom(4096)
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self.cookie = reply
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self.port = port
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except:
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print("connect exception ", path, str(port))
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if self.s != None:
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self.s.close()
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raise
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self.started = True
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def __del__(self):
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self.close()
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def close(self):
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if self.attached:
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try:
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self.detach()
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except Exception as e:
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# Need to ignore this allow the socket to be closed
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self.attached = False
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pass
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if self.started:
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self.s.close()
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if not self.udp:
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os.unlink(self.local)
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self.started = False
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def request(self, cmd, timeout=10):
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if type(cmd) == str:
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try:
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cmd2 = cmd.encode()
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cmd = cmd2
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except UnicodeDecodeError as e:
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pass
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if self.udp:
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self.s.sendto(self.cookie + cmd, self.sockaddr)
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else:
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self.s.send(cmd)
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[r, w, e] = select.select([self.s], [], [], timeout)
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if r:
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res = self.s.recv(4096).decode()
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try:
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r = str(res)
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except UnicodeDecodeError as e:
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r = res
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return r
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raise Exception("Timeout on waiting response")
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def attach(self):
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if self.attached:
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return None
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res = self.request("ATTACH")
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if "OK" in res:
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self.attached = True
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return None
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raise Exception("ATTACH failed")
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def detach(self):
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if not self.attached:
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return None
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if self.s.fileno() == -1:
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self.attached = False
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return None
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while self.pending():
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ev = self.recv()
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res = self.request("DETACH")
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if "FAIL" not in res:
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self.attached = False
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return None
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raise Exception("DETACH failed")
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def terminate(self):
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if self.attached:
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try:
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self.detach()
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except Exception as e:
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# Need to ignore this to allow the socket to be closed
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self.attached = False
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self.request("TERMINATE")
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self.close()
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def pending(self, timeout=0):
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[r, w, e] = select.select([self.s], [], [], timeout)
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if r:
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return True
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return False
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def recv(self):
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res = self.s.recv(4096).decode()
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try:
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r = str(res)
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except UnicodeDecodeError as e:
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r = res
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return r
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