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tests: Add basic MLO CSA test case

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Verify that CSA can be performed on the first link of an AP MLD and
further check that traffic still continues even after channel switch.

Finally, check again that a subsequent CSA can be performed without
affecting the data traffic.

Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
This commit is contained in:
Aditya Kumar Singh 2024-03-08 10:05:08 +05:30 committed by Jouni Malinen
parent da833a7520
commit 2986146d9c
1 changed files with 75 additions and 0 deletions
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75
tests/hwsim/test_eht.py
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@ -1747,3 +1747,78 @@ def test_eht_mld_and_mlds(dev, apdev):
logger.info("Assigned AIDs: " + str(aid))
if len(set(aid)) != 2:
raise Exception("AP MLD did not assign unique AID to each non-AP MLD")
def mlo_perform_csa(hapd, command, freq, dev):
match_str = "freq=" + str(freq)
hapd.request(command)
ev = hapd.wait_event(["CTRL-EVENT-STARTED-CHANNEL-SWITCH"], timeout=10)
if ev is None:
raise Exception("Channel switch start event not seen")
if match_str not in ev:
raise Exception("Unexpected channel in CS started")
ev = hapd.wait_event(["CTRL-EVENT-CHANNEL-SWITCH"], timeout=10)
if ev is None:
raise Exception("Channel switch completion event not seen")
if match_str not in ev:
raise Exception("Unexpected channel in CS completed")
ev = hapd.wait_event(["AP-CSA-FINISHED"], timeout=10)
if ev is None:
raise Exception("CSA finished event timed out")
if match_str not in ev:
raise Exception("Unexpected channel in CSA finished event")
ev = dev.wait_event(["CTRL-EVENT-LINK-CHANNEL-SWITCH"], timeout=10)
if ev is None:
raise Exception("Non-AP MLD did not report CS")
if match_str not in ev:
raise Exception("Unexpected channel in CS event from non-AP MLD")
time.sleep(0.5)
def test_eht_mlo_csa(dev, apdev):
"""EHT MLD AP connected to non-AP MLD. Seamless channel switch"""
csa_supported(dev[0])
with HWSimRadio(use_mlo=True) as (hapd_radio, hapd_iface), \
HWSimRadio(use_mlo=True) as (wpas_radio, wpas_iface):
wpas = WpaSupplicant(global_iface='/tmp/wpas-wlan5')
wpas.interface_add(wpas_iface)
ssid = "mld_ap"
passphrase = 'qwertyuiop'
params = eht_mld_ap_wpa2_params(ssid, passphrase,
key_mgmt="SAE", mfp="2", pwe='1')
hapd0 = eht_mld_enable_ap(hapd_iface, params)
params['channel'] = '6'
hapd1 = eht_mld_enable_ap(hapd_iface, params)
wpas.set("sae_pwe", "1")
wpas.connect(ssid, sae_password=passphrase, scan_freq="2412 2437",
key_mgmt="SAE", ieee80211w="2")
eht_verify_status(wpas, hapd0, 2412, 20, is_ht=True, mld=True,
valid_links=3, active_links=3)
eht_verify_wifi_version(wpas)
traffic_test(wpas, hapd0)
logger.info("Perform CSA on 1st link")
mlo_perform_csa(hapd0, "CHAN_SWITCH 5 2462 ht he eht blocktx",
2462, wpas)
logger.info("Test traffic after 1st link CSA completes")
traffic_test(wpas, hapd0)
logger.info("Perform CSA on 1st link and bring it back to original channel")
mlo_perform_csa(hapd0, "CHAN_SWITCH 5 2412 ht he eht blocktx",
2412, wpas)
logger.info("Test traffic again after 1st link CSA completes")
traffic_test(wpas, hapd0)
#TODO: CSA on non-first link