[PATCH v2 17/22] tests: wpasupplicant.py allow to use remote host

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Allow to use remote host using wpaspy.Ctrl with
UDP support.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@xxxxxxxxx>
---
 tests/hwsim/wpasupplicant.py | 46 ++++++++++++++++++++++++++++++++++++--------
 1 file changed, 38 insertions(+), 8 deletions(-)

diff --git a/tests/hwsim/wpasupplicant.py b/tests/hwsim/wpasupplicant.py
index da90ffd..8fb5ce7 100644
--- a/tests/hwsim/wpasupplicant.py
+++ b/tests/hwsim/wpasupplicant.py
@@ -17,18 +17,23 @@ logger = logging.getLogger()
 wpas_ctrl = '/var/run/wpa_supplicant'
 
 class WpaSupplicant:
-    def __init__(self, ifname=None, global_iface=None):
+    def __init__(self, ifname=None, global_iface=None, hostname=None, port=9877, global_port=9878):
+        self.hostname = hostname
         self.group_ifname = None
         self.gctrl_mon = None
         if ifname:
-            self.set_ifname(ifname)
+            self.set_ifname(ifname, hostname, port)
         else:
             self.ifname = None
 
         self.global_iface = global_iface
         if global_iface:
-            self.global_ctrl = wpaspy.Ctrl(global_iface)
-            self.global_mon = wpaspy.Ctrl(global_iface)
+            if hostname != None:
+                self.global_ctrl = wpaspy.Ctrl(hostname, global_port)
+                self.global_mon = wpaspy.Ctrl(hostname, global_port)
+            else:
+                self.global_ctrl = wpaspy.Ctrl(global_iface)
+                self.global_mon = wpaspy.Ctrl(global_iface)
             self.global_mon.attach()
         else:
             self.global_mon = None
@@ -40,10 +45,14 @@ class WpaSupplicant:
             self.global_ctrl = None
         self.remove_ifname()
 
-    def set_ifname(self, ifname):
+    def set_ifname(self, ifname, hostname=None, port=9877):
         self.ifname = ifname
-        self.ctrl = wpaspy.Ctrl(os.path.join(wpas_ctrl, ifname))
-        self.mon = wpaspy.Ctrl(os.path.join(wpas_ctrl, ifname))
+        if hostname != None:
+            self.ctrl = wpaspy.Ctrl(hostname, port)
+            self.mon = wpaspy.Ctrl(hostname, port)
+        else:
+            self.ctrl = wpaspy.Ctrl(os.path.join(wpas_ctrl, ifname))
+            self.mon = wpaspy.Ctrl(os.path.join(wpas_ctrl, ifname))
         self.mon.attach()
 
     def remove_ifname(self):
@@ -53,6 +62,26 @@ class WpaSupplicant:
             self.ctrl = None
             self.ifname = None
 
+    def get_ctrl_iface_port(self, ifname):
+        res = -1
+        if self.hostname is None:
+            return None
+
+        res = self.global_request("INTERFACES")
+        lines = res.splitlines()
+        for line in lines:
+            words = line.split()
+            if words[0] == ifname:
+                res = 1
+                break
+        if res == -1:
+            raise Exception("Could not find UDP port for " + ifname)
+        res = line.find("ctrl_iface=udp:")
+        if res == -1:
+            raise Exception("Wrong ctrl_interace format")
+        words = line.split(":")
+        return int(words[1])
+
     def interface_add(self, ifname, config="", driver="nl80211",
                       drv_params=None, br_ifname=None, create=False,
                       set_ifname=True, all_params=False, if_type=None):
@@ -85,7 +114,8 @@ class WpaSupplicant:
         if "FAIL" in self.global_request(cmd):
             raise Exception("Failed to add a dynamic wpa_supplicant interface")
         if not create and set_ifname:
-            self.set_ifname(ifname)
+                port = self.get_ctrl_iface_port(ifname)
+                self.set_ifname(ifname, self.hostname, port)
 
     def interface_remove(self, ifname):
         self.remove_ifname()
-- 
1.9.1


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