[PATCH v4 16/29] wpaspy: add support for UDP connection

[Janusz Dziedzic]

hostname and port could be specyfied when using wpaspy.Ctrl
So, we can connect to remote clients now.

This could be tested also using test.py application eg.
./test.py <hostname> <port>

Signed-off-by: Janusz Dziedzic <janusz.dziedzic at tieto.com>
---
 wpaspy/test.py   | 23 +++++++++++++++++-----
 wpaspy/wpaspy.py | 60 ++++++++++++++++++++++++++++++++++++++++++++------------
 2 files changed, 65 insertions(+), 18 deletions(-)

diff --git a/wpaspy/test.py b/wpaspy/test.py
index 493af7a..9141a8d 100755
--- a/wpaspy/test.py
+++ b/wpaspy/test.py
@@ -7,13 +7,23 @@
 # See README for more details.
 
 import os
+import sys
 import time
 import wpaspy
 
 wpas_ctrl = '/var/run/wpa_supplicant'
 
-def wpas_connect():
+def wpas_connect(host=None, port=9877):
     ifaces = []
+
+    if host != None:
+        try:
+            wpas = wpaspy.Ctrl(host, port)
+            return wpas
+        except:
+            print "Could not connect to host: ", host
+            return None
+
     if os.path.isdir(wpas_ctrl):
         try:
             ifaces = [os.path.join(wpas_ctrl, i) for i in os.listdir(wpas_ctrl)]
@@ -34,15 +44,15 @@ def wpas_connect():
     return None
 
 
-def main():
+def main(host=None, port=9877):
     print "Testing wpa_supplicant control interface connection"
-    wpas = wpas_connect()
+    wpas = wpas_connect(host, port)
     if wpas is None:
         return
     print "Connected to wpa_supplicant"
     print wpas.request('PING')
 
-    mon = wpas_connect()
+    mon = wpas_connect(host, port)
     if mon is None:
         print "Could not open event monitor connection"
         return
@@ -66,4 +76,7 @@ def main():
 
 
 if __name__ == "__main__":
-    main()
+    if len(sys.argv) > 2:
+        main(host=sys.argv[1], port=int(sys.argv[2]))
+    else:
+        main()
diff --git a/wpaspy/wpaspy.py b/wpaspy/wpaspy.py
index 2f57d74..30bb652 100644
--- a/wpaspy/wpaspy.py
+++ b/wpaspy/wpaspy.py
@@ -7,27 +7,57 @@
 # See README for more details.
 
 import os
+import stat
 import socket
 import select
 
 counter = 0
 
 class Ctrl:
-    def __init__(self, path):
+    def __init__(self, path, port=9877):
         global counter
         self.started = False
         self.attached = False
-        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)
+        self.path = path
+        self.port = port
+
         try:
-            self.s.connect(self.dest)
-        except Exception, e:
-            self.s.close()
-            os.unlink(self.local)
-            raise
+            mode = os.stat(path).st_mode
+            if stat.S_ISSOCK(mode):
+                self.udp = False
+        except:
+            self.udp = True
+
+
+        if self.udp == False:
+            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, e:
+                self.s.close()
+                os.unlink(self.local)
+                raise
+        else:
+            try:
+                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):
@@ -43,11 +73,15 @@ class Ctrl:
                 pass
         if self.started:
             self.s.close()
-            os.unlink(self.local)
+            if self.udp == False:
+                os.unlink(self.local)
             self.started = False
 
     def request(self, cmd, timeout=10):
-        self.s.send(cmd)
+        if self.udp == True:
+            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)
-- 
1.9.1