tests: Add WpaSupplicant.wait_group_event()

This can be used to wait for events from a P2P group interface.

Signed-off-by: Jouni Malinen <j@w1.fi>

tests/hwsim/wpasupplicant.py

@@ -19,6 +19,7 @@ wpas_ctrl = '/var/run/wpa_supplicant'
 class WpaSupplicant:
     def __init__(self, ifname=None, global_iface=None):
         self.group_ifname = None
+        self.gctrl_mon = None
         if ifname:
             self.set_ifname(ifname)
         else:
@@ -100,6 +101,12 @@ class WpaSupplicant:
         self.request("SET p2p_pref_chan ")
         self.request("SET p2p_no_group_iface 1")
         self.request("SET p2p_go_intent 7")
+        if self.gctrl_mon:
+            try:
+                self.gctrl_mon.detach()
+            except:
+                pass
+            self.gctrl_mon = None
         self.group_ifname = None
         self.dump_monitor()
 
@@ -426,6 +433,12 @@ class WpaSupplicant:
         res['result'] = 'success'
         res['ifname'] = s[2]
         self.group_ifname = s[2]
+        try:
+            self.gctrl_mon = wpaspy.Ctrl(os.path.join(wpas_ctrl, self.group_ifname))
+            self.gctrl_mon.attach()
+        except:
+            logger.debug("Could not open monitor socket for group interface")
+            self.gctrl_mon = None
         res['role'] = s[3]
         res['ssid'] = s[4]
         res['freq'] = s[5]
@@ -570,7 +583,35 @@ class WpaSupplicant:
                     break
         return None
 
+    def wait_group_event(self, events, timeout=10):
+        if self.group_ifname and self.group_ifname != self.ifname:
+            if self.gctrl_mon is None:
+                return None
+            start = os.times()[4]
+            while True:
+                while self.gctrl_mon.pending():
+                    ev = self.gctrl_mon.recv()
+                    logger.debug(self.group_ifname + ": " + ev)
+                    for event in events:
+                        if event in ev:
+                            return ev
+                now = os.times()[4]
+                remaining = start + timeout - now
+                if remaining <= 0:
+                    break
+                if not self.gctrl_mon.pending(timeout=remaining):
+                    break
+            return None
+
+        return self.wait_event(events, timeout)
+
     def wait_go_ending_session(self):
+        if self.gctrl_mon:
+            try:
+                self.gctrl_mon.detach()
+            except:
+                pass
+            self.gctrl_mon = None
         ev = self.wait_event(["P2P-GROUP-REMOVED"], timeout=3)
         if ev is None:
             raise Exception("Group removal event timed out")
@@ -586,6 +627,12 @@ class WpaSupplicant:
             logger.debug(self.ifname + "(global): " + ev)
 
     def remove_group(self, ifname=None):
+        if self.gctrl_mon:
+            try:
+                self.gctrl_mon.detach()
+            except:
+                pass
+            self.gctrl_mon = None
         if ifname is None:
             ifname = self.group_ifname if self.group_ifname else self.ifname
         if "OK" not in self.global_request("P2P_GROUP_REMOVE " + ifname):