Revert "Merge sc-d1-dev 6958804 into master."

This reverts commit 3aed9d58ff5cfdbbafc5f8ec8bedd6a6d1ed2221.

Reason for revert: Certain changes were originally not merged from master to sc-d1-dev. By merging sc-d1-dev back to master, those changes would be lost. In addition, sc-d1-dev has never been used for development for platform/tools/test/connectivity.

Bug: 172861149
Change-Id: Ie2d73b100cebfc098a15021c2ed122af165fd869
diff --git a/acts_tests/tests/google/wifi/WifiChannelSwitchStressTest.py b/acts_tests/tests/google/wifi/WifiChannelSwitchStressTest.py
new file mode 100644
index 0000000..bdba6e1
--- /dev/null
+++ b/acts_tests/tests/google/wifi/WifiChannelSwitchStressTest.py
@@ -0,0 +1,308 @@
+#!/usr/bin/env python3
+#
+#   Copyright 2020 - The Android Open Source Project
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+import time
+import random
+import re
+import logging
+import acts.test_utils.wifi.wifi_test_utils as wutils
+import acts.test_utils.tel.tel_test_utils as tel_utils
+import acts.utils as utils
+from acts import asserts
+from acts.test_decorators import test_tracker_info
+from acts.test_utils.wifi.WifiBaseTest import WifiBaseTest
+from acts import signals
+from acts.controllers import packet_capture
+from acts.controllers.ap_lib.hostapd_constants import BAND_2G
+from acts.controllers.ap_lib.hostapd_constants import BAND_5G
+
+
+WifiEnums = wutils.WifiEnums
+
+
+class WifiChannelSwitchStressTest(WifiBaseTest):
+
+    def setup_class(self):
+        super().setup_class()
+        self.dut = self.android_devices[0]
+        self.dut_client = self.android_devices[1]
+        utils.require_sl4a((self.dut, self.dut_client))
+
+        if hasattr(self, 'packet_capture'):
+            self.packet_capture = self.packet_capture[0]
+
+        req_params = ["dbs_supported_models"]
+        opt_param = ["stress_count", "cs_count"]
+        self.unpack_userparams(
+            req_param_names=req_params, opt_param_names=opt_param)
+
+        self.AP_IFACE = 'wlan0'
+        if self.dut.model in self.dbs_supported_models:
+            self.AP_IFACE = 'wlan1'
+
+        for ad in self.android_devices:
+            wutils.wifi_test_device_init(ad)
+            utils.sync_device_time(ad)
+            wutils.set_wifi_country_code(ad, WifiEnums.CountryCode.US)
+
+    def setup_test(self):
+        super().setup_test()
+        for ad in self.android_devices:
+            ad.droid.wakeLockAcquireBright()
+            ad.droid.wakeUpNow()
+            try:
+                if self.dut.droid.wifiIsApEnabled():
+                    wutils.stop_wifi_tethering(self.dut)
+            except signals.TestFailure:
+                pass
+        wutils.wifi_toggle_state(self.dut_client, True)
+        init_sim_state = tel_utils.is_sim_ready(self.log, self.dut)
+        if init_sim_state:
+            self.check_cell_data_and_enable()
+        self.config = wutils.create_softap_config()
+        self.channel_list_2g = self.generate_random_list(
+            WifiEnums.ALL_2G_FREQUENCIES)
+        self.channel_list_5g = self.generate_random_list(
+            WifiEnums.NONE_DFS_5G_FREQUENCIES)
+
+    def teardown_test(self):
+        super().teardown_test()
+        for ad in self.android_devices:
+            ad.droid.wakeLockRelease()
+            ad.droid.goToSleepNow()
+            wutils.reset_wifi(ad)
+        try:
+            wutils.stop_wifi_tethering(self.dut)
+        except signals.TestFailure:
+            pass
+
+    def on_fail(self, test_name, begin_time):
+        try:
+            wutils.stop_pcap(self.packet_capture, self.pcap_procs, False)
+        except signals.TestFailure:
+            pass
+        super().on_fail(test_name, begin_time)
+
+    def check_cell_data_and_enable(self):
+        """Make sure that cell data is enabled if there is a sim present.
+
+        If a sim is active, cell data needs to be enabled to allow provisioning
+        checks through (when applicable).  This is done to relax hardware
+        requirements on DUTs - without this check, running this set of tests
+        after other wifi tests may cause failures.
+        """
+        if not self.dut.droid.telephonyIsDataEnabled():
+            self.dut.log.info("need to enable data")
+            self.dut.droid.telephonyToggleDataConnection(True)
+            asserts.assert_true(self.dut.droid.telephonyIsDataEnabled(),
+                                "Failed to enable cell data for dut.")
+
+    def get_wlan0_link(self, dut):
+        """ get wlan0 interface status"""
+        get_wlan0 = 'wpa_cli -iwlan0 -g@android:wpa_wlan0 IFNAME=wlan0 status'
+        out = dut.adb.shell(get_wlan0)
+        out = dict(re.findall(r'(\S+)=(".*?"|\S+)', out))
+        asserts.assert_true("ssid" in out,
+                            "Client doesn't connect to any network")
+        return out
+
+    def get_wlan1_status(self, dut):
+        """ get wlan1 interface status"""
+        get_wlan1 = 'hostapd_cli status'
+        out_wlan1 = dut.adb.shell(get_wlan1)
+        out_wlan1 = dict(re.findall(r'(\S+)=(".*?"|\S+)', out_wlan1))
+        return out_wlan1
+
+    def generate_random_list(self, lst):
+        """Generate a list where
+        the previous and subsequent items
+        do not repeat"""
+        channel_list = []
+        num = random.choice(lst)
+        channel_list.append(num)
+        for i in range(1, self.stress_count):
+            num = random.choice(lst)
+            while num == channel_list[-1]:
+                num = random.choice(lst)
+            channel_list.append(num)
+        return channel_list
+
+    def conf_packet_capture(self, band, channel):
+        """Configure packet capture on necessary channels."""
+        freq_to_chan = wutils.WifiEnums.freq_to_channel[int(channel)]
+        logging.info("Capturing packets from "
+                     "frequency:{}, Channel:{}".format(channel, freq_to_chan))
+        result = self.packet_capture.configure_monitor_mode(band, freq_to_chan)
+        if not result:
+            logging.error("Failed to configure channel "
+                          "for {} band".format(band))
+        self.pcap_procs = wutils.start_pcap(
+            self.packet_capture, band, self.test_name)
+
+        time.sleep(5)
+
+    @test_tracker_info(uuid="b1a8b00e-eca8-4eba-99e9-c7a3beb2a009")
+    def test_softap_channel_switch_stress_2g(self):
+        """
+        1. Disable DUT's Wi-Fi
+        2. Enable CLIENT's Wi-Fi
+        3. Check DUT's sim is ready or not
+        4. Enable DUT's mobile data
+        5. Bring up DUT's softap in 2g
+        6. CLIENT connect to DUT
+        7. DUT switch to different 2g channel
+        8. Verify CLIENT follow the change
+        9, Repeat step 7 and 8
+        """
+        wutils.start_wifi_tethering(self.dut,
+                                    self.config[wutils.WifiEnums.SSID_KEY],
+                                    self.config[wutils.WifiEnums.PWD_KEY],
+                                    WifiEnums.WIFI_CONFIG_APBAND_2G)
+        wutils.connect_to_wifi_network(self.dut_client, self.config)
+        time.sleep(10)
+        for count in range(len(self.channel_list_2g)):
+            self.dut.log.info("2g channel switch iteration : {}".format(count+1))
+            channel_2g = str(self.channel_list_2g[count])
+            # Configure sniffer before set SoftAP channel
+            if hasattr(self, 'packet_capture'):
+                self.conf_packet_capture(BAND_2G, channel_2g)
+            # Set SoftAP channel
+            wutils.set_softap_channel(self.dut,
+                                      self.AP_IFACE,
+                                      self.cs_count, channel_2g)
+            time.sleep(10)
+            softap_frequency = int(self.get_wlan1_status(self.dut)['freq'])
+            self.dut.log.info('softap frequency : {}'.format(softap_frequency))
+            client_frequency = int(self.get_wlan0_link(self.dut_client)["freq"])
+            self.dut_client.log.info(
+                "client frequency : {}".format(client_frequency))
+            asserts.assert_true(
+                softap_frequency == client_frequency,
+                "hotspot frequency != client frequency")
+            if hasattr(self, 'packet_capture'):
+                wutils.stop_pcap(self.packet_capture, self.pcap_procs, False)
+
+    @test_tracker_info(uuid="3411cb7c-2609-433a-97b6-202a096dc71b")
+    def test_softap_channel_switch_stress_5g(self):
+        """
+        1. Disable DUT's Wi-Fi
+        2. Enable CLIENT's Wi-Fi
+        3. Check DUT's sim is ready or not
+        4. Enable DUT's mobile data
+        5. Bring up DUT's softap in 5g
+        6. CLIENT connect to DUT
+        7. DUT switch to different 5g channel
+        8. Verify CLIENT follow the change
+        9, Repeat step 7 and 8
+        """
+        wutils.start_wifi_tethering(self.dut,
+                                    self.config[wutils.WifiEnums.SSID_KEY],
+                                    self.config[wutils.WifiEnums.PWD_KEY],
+                                    WifiEnums.WIFI_CONFIG_APBAND_5G)
+        wutils.connect_to_wifi_network(self.dut_client, self.config)
+        time.sleep(10)
+        for count in range(len(self.channel_list_5g)):
+            self.dut.log.info("5g channel switch iteration : {}".format(count+1))
+            channel_5g = str(self.channel_list_5g[count])
+            # Configure sniffer before set SoftAP channel
+            if hasattr(self, 'packet_capture'):
+                self.conf_packet_capture(BAND_5G, channel_5g)
+            # Set SoftAP channel
+            wutils.set_softap_channel(self.dut,
+                                      self.AP_IFACE,
+                                      self.cs_count, channel_5g)
+            time.sleep(10)
+            softap_frequency = int(self.get_wlan1_status(self.dut)['freq'])
+            self.dut.log.info('softap frequency : {}'.format(softap_frequency))
+            client_frequency = int(self.get_wlan0_link(self.dut_client)["freq"])
+            self.dut_client.log.info(
+                "client frequency : {}".format(client_frequency))
+            asserts.assert_true(
+                softap_frequency == client_frequency,
+                "hotspot frequency != client frequency")
+            if hasattr(self, 'packet_capture'):
+                wutils.stop_pcap(self.packet_capture, self.pcap_procs, False)
+
+    @test_tracker_info(uuid="0f279058-119f-49fc-b8d6-fb2991cc35aa")
+    def test_softap_channel_switch_stress_2g_5g(self):
+        """
+        1. Disable DUT's Wi-Fi
+        2. Enable CLIENT's Wi-Fi
+        3. Check DUT's sim is ready or not
+        4. Enable DUT's mobile data
+        5. Bring up DUT's softap in 2g
+        6. CLIENT connect to DUT
+        7. DUT switch to different 2g channel
+        8. Verify CLIENT follow the change
+        9. DUT switch to 5g channel
+        10. Verify CLIENT follow the change
+        11. Repeat step 7 to 10
+        """
+        for count in range(self.stress_count):
+            self.log.info("2g 5g channel switch iteration : {}".format(count+1))
+            wutils.start_wifi_tethering(self.dut,
+                                        self.config[wutils.WifiEnums.SSID_KEY],
+                                        self.config[wutils.WifiEnums.PWD_KEY],
+                                        WifiEnums.WIFI_CONFIG_APBAND_2G)
+            wutils.connect_to_wifi_network(self.dut_client, self.config)
+            self.log.info("wait 10 secs for client reconnect to dut")
+            time.sleep(10)
+            channel_2g = self.channel_list_2g[count]
+            if hasattr(self, 'packet_capture'):
+                self.conf_packet_capture(BAND_2G, channel_2g)
+            wutils.set_softap_channel(self.dut,
+                                      self.AP_IFACE,
+                                      self.cs_count, channel_2g)
+            time.sleep(10)
+            softap_frequency = int(self.get_wlan1_status(self.dut)['freq'])
+            self.dut.log.info('softap frequency : {}'.format(softap_frequency))
+            client_frequency = int(self.get_wlan0_link(self.dut_client)["freq"])
+            self.dut_client.log.info(
+                "client frequency : {}".format(client_frequency))
+            asserts.assert_true(
+                softap_frequency == client_frequency,
+                "hotspot frequency != client frequency")
+            wutils.stop_wifi_tethering(self.dut)
+            if hasattr(self, 'packet_capture'):
+                wutils.stop_pcap(self.packet_capture, self.pcap_procs, False)
+            self.dut.log.info('switch to SoftAP 5g')
+
+            # switch to SoftAp 5g
+            wutils.start_wifi_tethering(self.dut,
+                                        self.config[wutils.WifiEnums.SSID_KEY],
+                                        self.config[wutils.WifiEnums.PWD_KEY],
+                                        WifiEnums.WIFI_CONFIG_APBAND_5G)
+            wutils.connect_to_wifi_network(self.dut_client, self.config)
+            self.log.info("wait 10 secs for client reconnect to dut")
+            time.sleep(10)
+            channel_5g = self.channel_list_5g[count]
+            if hasattr(self, 'packet_capture'):
+                self.conf_packet_capture(BAND_5G, channel_5g)
+            wutils.set_softap_channel(self.dut,
+                                      self.AP_IFACE,
+                                      self.cs_count, channel_5g)
+            time.sleep(10)
+            softap_frequency = int(self.get_wlan1_status(self.dut)['freq'])
+            self.dut.log.info('softap frequency : {}'.format(softap_frequency))
+            client_frequency = int(self.get_wlan0_link(self.dut_client)["freq"])
+            self.dut_client.log.info(
+                "client frequency : {}".format(client_frequency))
+            asserts.assert_true(
+                softap_frequency == client_frequency,
+                "hotspot frequency != client frequency")
+            wutils.stop_wifi_tethering(self.dut)
+            if hasattr(self, 'packet_capture'):
+                wutils.stop_pcap(self.packet_capture, self.pcap_procs, False)