tests: Use 10 retries for over-the-air broadcast connectivity

The regular hwsim tests use both unicast and broadcast frames to test
the connectivity between 2 interfaces. For real hardware (remote hwsim
tests) the broadcast frames will sometimes not be seen by all connected
stations since they can be in low power mode during DTIM or because
broadcast frames are not ACKed. Use 10 retries for broadcast
connectivity tests for real hardware so that the test will pass if we
successfully received at least one of them.

Signed-off-by: Jonathan Afek <jonathanx.afek@intel.com>

tests/hwsim/hostapd.py

@@ -119,6 +119,7 @@ class HostapdGlobal:
 
 class Hostapd:
     def __init__(self, ifname, bssidx=0, hostname=None, port=8877):
+        self.hostname = hostname
         self.host = remotehost.Host(hostname, ifname)
         self.ifname = ifname
         if hostname is None:

tests/hwsim/hwsim_utils.py

@@ -25,6 +25,11 @@ def run_connectivity_test(dev1, dev2, tos, dev1group=False, dev2group=False,
     dev1.dump_monitor()
     dev2.dump_monitor()
 
+    if dev1.hostname is None and dev2.hostname is None:
+        broadcast_retry_c = 1
+    else:
+        broadcast_retry_c = 10
+
     try:
         if config:
             cmd = "DATA_TEST_CONFIG 1"
@@ -62,18 +67,25 @@ def run_connectivity_test(dev1, dev2, tos, dev1group=False, dev2group=False,
             raise Exception("Unexpected dev1->dev2 unicast data result")
 
         cmd = "DATA_TEST_TX ff:ff:ff:ff:ff:ff {} {}".format(addr1, tos)
-        if dev1group:
-            dev1.group_request(cmd)
-        else:
-            dev1.request(cmd)
-        if dev2group:
-            ev = dev2.wait_group_event(["DATA-TEST-RX"], timeout=timeout)
-        else:
-            ev = dev2.wait_event(["DATA-TEST-RX"], timeout=timeout)
-        if ev is None:
-            raise Exception("dev1->dev2 broadcast data delivery failed")
-        if "DATA-TEST-RX ff:ff:ff:ff:ff:ff {}".format(addr1) not in ev:
-            raise Exception("Unexpected dev1->dev2 broadcast data result")
+        for i in xrange(broadcast_retry_c):
+            try:
+                if dev1group:
+                    dev1.group_request(cmd)
+                else:
+                    dev1.request(cmd)
+                if dev2group:
+                    ev = dev2.wait_group_event(["DATA-TEST-RX"],
+                                               timeout=timeout)
+                else:
+                    ev = dev2.wait_event(["DATA-TEST-RX"], timeout=timeout)
+                if ev is None:
+                    raise Exception("dev1->dev2 broadcast data delivery failed")
+                if "DATA-TEST-RX ff:ff:ff:ff:ff:ff {}".format(addr1) not in ev:
+                    raise Exception("Unexpected dev1->dev2 broadcast data result")
+                break
+            except Exception as e:
+                if i == broadcast_retry_c - 1:
+                    raise
 
         cmd = "DATA_TEST_TX {} {} {}".format(addr1, addr2, tos)
         if dev2group:
@@ -90,18 +102,25 @@ def run_connectivity_test(dev1, dev2, tos, dev1group=False, dev2group=False,
             raise Exception("Unexpected dev2->dev1 unicast data result")
 
         cmd = "DATA_TEST_TX ff:ff:ff:ff:ff:ff {} {}".format(addr2, tos)
-        if dev2group:
-            dev2.group_request(cmd)
-        else:
-            dev2.request(cmd)
-        if dev1group:
-            ev = dev1.wait_group_event(["DATA-TEST-RX"], timeout=timeout)
-        else:
-            ev = dev1.wait_event(["DATA-TEST-RX"], timeout=timeout)
-        if ev is None:
-            raise Exception("dev2->dev1 broadcast data delivery failed")
-        if "DATA-TEST-RX ff:ff:ff:ff:ff:ff {}".format(addr2) not in ev:
-            raise Exception("Unexpected dev2->dev1 broadcast data result")
+        for i in xrange(broadcast_retry_c):
+            try:
+                if dev2group:
+                    dev2.group_request(cmd)
+                else:
+                    dev2.request(cmd)
+                if dev1group:
+                    ev = dev1.wait_group_event(["DATA-TEST-RX"],
+                                               timeout=timeout)
+                else:
+                    ev = dev1.wait_event(["DATA-TEST-RX"], timeout=timeout)
+                if ev is None:
+                    raise Exception("dev2->dev1 broadcast data delivery failed")
+                if "DATA-TEST-RX ff:ff:ff:ff:ff:ff {}".format(addr2) not in ev:
+                    raise Exception("Unexpected dev2->dev1 broadcast data result")
+                break
+            except Exception as e:
+                if i == broadcast_retry_c - 1:
+                    raise
     finally:
         if config:
             if dev1group: