tests: Add P2P channel selection test cases for group formation

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

tests/hwsim/test_p2p_grpform.py

@@ -20,7 +20,15 @@ def check_grpform_results(i_res, r_res):
     if i_res['ssid'] != r_res['ssid']:
         raise Exception("SSID mismatch")
     if i_res['freq'] != r_res['freq']:
-        raise Exception("SSID mismatch")
+        raise Exception("freq mismatch")
+    if 'go_neg_freq' in r_res and i_res['go_neg_freq'] != r_res['go_neg_freq']:
+        raise Exception("go_neg_freq mismatch")
+    if i_res['freq'] != i_res['go_neg_freq']:
+        raise Exception("freq/go_neg_freq mismatch")
+    if i_res['role'] != i_res['go_neg_role']:
+        raise Exception("role/go_neg_role mismatch")
+    if 'go_neg_role' in r_res and r_res['role'] != r_res['go_neg_role']:
+        raise Exception("role/go_neg_role mismatch")
     if i_res['go_dev_addr'] != r_res['go_dev_addr']:
         raise Exception("GO Device Address mismatch")
 
@@ -55,13 +63,13 @@ def go_neg_pin(i_dev, r_dev, i_intent=None, r_intent=None, i_method='enter', r_m
     hwsim_utils.test_connectivity_p2p(r_dev, i_dev)
     i_dev.dump_monitor()
 
-def go_neg_pin_authorized(i_dev, r_dev, i_intent=None, r_intent=None, expect_failure=False, i_go_neg_status=None, i_method='enter', r_method='display'):
+def go_neg_pin_authorized(i_dev, r_dev, i_intent=None, r_intent=None, expect_failure=False, i_go_neg_status=None, i_method='enter', r_method='display', test_data=True, i_freq=None, r_freq=None):
     r_dev.p2p_listen()
     i_dev.p2p_listen()
     pin = r_dev.wps_read_pin()
     logger.info("Start GO negotiation " + i_dev.ifname + " -> " + r_dev.ifname)
-    r_dev.p2p_go_neg_auth(i_dev.p2p_dev_addr(), pin, r_method, go_intent=r_intent)
+    r_dev.p2p_go_neg_auth(i_dev.p2p_dev_addr(), pin, r_method, go_intent=r_intent, freq=r_freq)
-    i_res = i_dev.p2p_go_neg_init(r_dev.p2p_dev_addr(), pin, i_method, timeout=20, go_intent=i_intent, expect_failure=expect_failure)
+    i_res = i_dev.p2p_go_neg_init(r_dev.p2p_dev_addr(), pin, i_method, timeout=20, go_intent=i_intent, expect_failure=expect_failure, freq=i_freq)
     r_res = r_dev.p2p_go_neg_auth_result(expect_failure=expect_failure)
     logger.debug("i_res: " + str(i_res))
     logger.debug("r_res: " + str(r_res))
@@ -75,6 +83,7 @@ def go_neg_pin_authorized(i_dev, r_dev, i_intent=None, r_intent=None, expect_fai
     if expect_failure:
         return
     logger.info("Group formed")
+    if test_data:
         hwsim_utils.test_connectivity_p2p(r_dev, i_dev)
     return [i_res, r_res]
 
@@ -109,32 +118,29 @@ def go_neg_pbc(i_dev, r_dev, i_intent=None, r_intent=None):
     i_dev.dump_monitor()
     return [i_res, r_res]
 
-def test_grpform(dev):
+def remove_group(dev1, dev2):
-    """P2P group formation using PIN and authorized connection (init -> GO)"""
+    dev1.remove_group()
-    go_neg_pin_authorized(i_dev=dev[0], i_intent=15, r_dev=dev[1], r_intent=0)
-    dev[0].remove_group()
     try:
-        dev[1].remove_group()
+        dev2.remove_group()
     except:
         pass
 
+def test_grpform(dev):
+    """P2P group formation using PIN and authorized connection (init -> GO)"""
+    [i_res, r_res] = go_neg_pin_authorized(i_dev=dev[0], i_intent=15,
+                                           r_dev=dev[1], r_intent=0)
+    check_grpform_results(i_res, r_res)
+    remove_group(dev[0], dev[1])
+
 def test_grpform2(dev):
     """P2P group formation using PIN and authorized connection (resp -> GO)"""
     go_neg_pin_authorized(i_dev=dev[0], i_intent=0, r_dev=dev[1], r_intent=15)
-    dev[0].remove_group()
+    remove_group(dev[0], dev[1])
-    try:
-        dev[1].remove_group()
-    except:
-        pass
 
 def test_grpform3(dev):
     """P2P group formation using PIN and re-init GO Negotiation"""
     go_neg_pin(i_dev=dev[0], i_intent=15, r_dev=dev[1], r_intent=0)
-    dev[0].remove_group()
+    remove_group(dev[0], dev[1])
-    try:
-        dev[1].remove_group()
-    except:
-        pass
 
 def test_grpform_pbc(dev):
     """P2P group formation using PBC and re-init GO Negotiation"""
@@ -142,11 +148,7 @@ def test_grpform_pbc(dev):
     check_grpform_results(i_res, r_res)
     if i_res['role'] != 'GO' or r_res['role'] != 'client':
         raise Exception("Unexpected device roles")
-    dev[0].remove_group()
+    remove_group(dev[0], dev[1])
-    try:
-        dev[1].remove_group()
-    except:
-        pass
 
 def test_both_go_intent_15(dev):
     """P2P GO Negotiation with both devices using GO intent 15"""
@@ -197,3 +199,72 @@ def test_grpform_per_sta_psk_wps(dev):
     dev[0].remove_group()
     dev[2].request("DISCONNECT")
     dev[1].wait_go_ending_session()
+
+def test_grpform_force_chan_go(dev):
+    """P2P group formation forced channel selection by GO"""
+    [i_res, r_res] = go_neg_pin_authorized(i_dev=dev[0], i_intent=15,
+                                           i_freq=2432,
+                                           r_dev=dev[1], r_intent=0,
+                                           test_data=False)
+    check_grpform_results(i_res, r_res)
+    if i_res['freq'] != "2432":
+        raise Exception("Unexpected channel - did not follow GO's forced channel")
+    remove_group(dev[0], dev[1])
+
+def test_grpform_force_chan_cli(dev):
+    """P2P group formation forced channel selection by client"""
+    [i_res, r_res] = go_neg_pin_authorized(i_dev=dev[0], i_intent=0,
+                                           i_freq=2417,
+                                           r_dev=dev[1], r_intent=15,
+                                           test_data=False)
+    check_grpform_results(i_res, r_res)
+    if i_res['freq'] != "2417":
+        raise Exception("Unexpected channel - did not follow GO's forced channel")
+    remove_group(dev[0], dev[1])
+
+def test_grpform_force_chan_conflict(dev):
+    """P2P group formation fails due to forced channel mismatch"""
+    go_neg_pin_authorized(i_dev=dev[0], i_intent=0, i_freq=2422,
+                          r_dev=dev[1], r_intent=15, r_freq=2427,
+                          expect_failure=True, i_go_neg_status=7)
+
+def test_grpform_pref_chan_go(dev):
+    """P2P group formation preferred channel selection by GO"""
+    dev[0].request("SET p2p_pref_chan 81:7")
+    [i_res, r_res] = go_neg_pin_authorized(i_dev=dev[0], i_intent=15,
+                                           r_dev=dev[1], r_intent=0,
+                                           test_data=False)
+    check_grpform_results(i_res, r_res)
+    if i_res['freq'] != "2442":
+        raise Exception("Unexpected channel - did not follow GO's p2p_pref_chan")
+    remove_group(dev[0], dev[1])
+
+def test_grpform_pref_chan_go_overridden(dev):
+    """P2P group formation preferred channel selection by GO overridden by client"""
+    dev[1].request("SET p2p_pref_chan 81:7")
+    [i_res, r_res] = go_neg_pin_authorized(i_dev=dev[0], i_intent=0,
+                                           i_freq=2422,
+                                           r_dev=dev[1], r_intent=15,
+                                           test_data=False)
+    check_grpform_results(i_res, r_res)
+    if i_res['freq'] != "2422":
+        raise Exception("Unexpected channel - did not follow client's forced channel")
+    remove_group(dev[0], dev[1])
+
+def test_grpform_no_go_freq_forcing_chan(dev):
+    """P2P group formation with no-GO freq forcing channel"""
+    dev[1].request("SET p2p_no_go_freq 100-200,300,4000-6000")
+    [i_res, r_res] = go_neg_pin_authorized(i_dev=dev[0], i_intent=0,
+                                           r_dev=dev[1], r_intent=15,
+                                           test_data=False)
+    check_grpform_results(i_res, r_res)
+    if int(i_res['freq']) > 4000:
+        raise Exception("Unexpected channel - did not follow no-GO freq")
+    remove_group(dev[0], dev[1])
+
+def test_grpform_no_go_freq_conflict(dev):
+    """P2P group formation fails due to no-GO range forced by client"""
+    dev[1].request("SET p2p_no_go_freq 2000-3000")
+    go_neg_pin_authorized(i_dev=dev[0], i_intent=0, i_freq=2422,
+                          r_dev=dev[1], r_intent=15,
+                          expect_failure=True, i_go_neg_status=7)

tests/hwsim/wpasupplicant.py

@@ -57,6 +57,9 @@ class WpaSupplicant:
             logger.info("FLUSH to " + self.ifname + " failed: " + res)
         self.request("SET ignore_old_scan_res 0")
         self.request("SET external_sim 0")
+        self.request("SET p2p_add_cli_chan 0")
+        self.request("SET p2p_no_go_freq ")
+        self.request("SET p2p_pref_chan ")
         self.request("P2P_SET per_sta_psk 0")
         self.request("P2P_SET disabled 0")
         self.request("P2P_SERVICE_FLUSH")
@@ -253,7 +256,7 @@ class WpaSupplicant:
                 vals[name] = value
         return vals
 
-    def group_form_result(self, ev, expect_failure=False):
+    def group_form_result(self, ev, expect_failure=False, go_neg_res=None):
         if expect_failure:
             if "P2P-GROUP-STARTED" in ev:
                 raise Exception("Group formation succeeded when expecting failure")
@@ -291,15 +294,26 @@ class WpaSupplicant:
         if p:
             res['passphrase'] = p.group(1)
         res['go_dev_addr'] = s[7]
+
+        if go_neg_res:
+            exp = r'<.>(P2P-GO-NEG-SUCCESS) role=(GO|client) freq=([0-9]*)'
+            s = re.split(exp, go_neg_res)
+            if len(s) < 4:
+                raise Exception("Could not parse P2P-GO-NEG-SUCCESS")
+            res['go_neg_role'] = s[2]
+            res['go_neg_freq'] = s[3]
+
         return res
 
-    def p2p_go_neg_auth(self, peer, pin, method, go_intent=None, persistent=False):
+    def p2p_go_neg_auth(self, peer, pin, method, go_intent=None, persistent=False, freq=None):
         if not self.discover_peer(peer):
             raise Exception("Peer " + peer + " not found")
         self.dump_monitor()
         cmd = "P2P_CONNECT " + peer + " " + pin + " " + method + " auth"
         if go_intent:
             cmd = cmd + ' go_intent=' + str(go_intent)
+        if freq:
+            cmd = cmd + ' freq=' + str(freq)
         if persistent:
             cmd = cmd + " persistent"
         if "OK" in self.global_request(cmd):
@@ -307,13 +321,22 @@ class WpaSupplicant:
         raise Exception("P2P_CONNECT (auth) failed")
 
     def p2p_go_neg_auth_result(self, timeout=1, expect_failure=False):
-        ev = self.wait_global_event(["P2P-GROUP-STARTED","P2P-GO-NEG-FAILURE"], timeout);
+        go_neg_res = None
+        ev = self.wait_global_event(["P2P-GO-NEG-SUCCESS",
+                                     "P2P-GO-NEG-FAILURE"], timeout);
+        if ev is None:
+            if expect_failure:
+                return None
+            raise Exception("Group formation timed out")
+        if "P2P-GO-NEG-SUCCESS" in ev:
+            go_neg_res = ev
+            ev = self.wait_global_event(["P2P-GROUP-STARTED"], timeout);
             if ev is None:
                 if expect_failure:
                     return None
                 raise Exception("Group formation timed out")
         self.dump_monitor()
-        return self.group_form_result(ev, expect_failure)
+        return self.group_form_result(ev, expect_failure, go_neg_res)
 
     def p2p_go_neg_init(self, peer, pin, method, timeout=0, go_intent=None, expect_failure=False, persistent=False, freq=None):
         if not self.discover_peer(peer):
@@ -333,13 +356,22 @@ class WpaSupplicant:
             if timeout == 0:
                 self.dump_monitor()
                 return None
-            ev = self.wait_global_event(["P2P-GROUP-STARTED","P2P-GO-NEG-FAILURE"], timeout)
+            go_neg_res = None
+            ev = self.wait_global_event(["P2P-GO-NEG-SUCCESS",
+                                         "P2P-GO-NEG-FAILURE"], timeout)
+            if ev is None:
+                if expect_failure:
+                    return None
+                raise Exception("Group formation timed out")
+            if "P2P-GO-NEG-SUCCESS" in ev:
+                go_neg_res = ev
+                ev = self.wait_global_event(["P2P-GROUP-STARTED"], timeout)
                 if ev is None:
                     if expect_failure:
                         return None
                     raise Exception("Group formation timed out")
             self.dump_monitor()
-            return self.group_form_result(ev, expect_failure)
+            return self.group_form_result(ev, expect_failure, go_neg_res)
         raise Exception("P2P_CONNECT failed")
 
     def wait_event(self, events, timeout):