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kernel/net/mac80211/tests/chan-mode.c
Benjamin Berg b46524b57a wifi: mac80211: tests: add tests for ieee80211_determine_chan_mode 
Add a few tests for ieee80211_determine_chan_mode that check that
mac80211 will not try to connect to an AP if an advertised basic rate is
not supported.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250205110958.530c81eb7fdc.Ia77f5efdf9efb70d2766a3d6bf425553bcb308e8@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2025-02-11 11:59:07 +01:00

254 lines
8.2 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* KUnit tests for channel mode functions
*
* Copyright (C) 2024 Intel Corporation
*/
#include <net/cfg80211.h>
#include <kunit/test.h>
#include "util.h"
MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING");
static const struct determine_chan_mode_case {
const char *desc;
u8 extra_supp_rate;
enum ieee80211_conn_mode conn_mode;
enum ieee80211_conn_mode expected_mode;
bool strict;
u8 userspace_selector;
struct ieee80211_ht_cap ht_capa_mask;
struct ieee80211_vht_cap vht_capa;
struct ieee80211_vht_cap vht_capa_mask;
u8 vht_basic_mcs_1_4_set:1,
vht_basic_mcs_5_8_set:1,
he_basic_mcs_1_4_set:1,
he_basic_mcs_5_8_set:1;
u8 vht_basic_mcs_1_4, vht_basic_mcs_5_8;
u8 he_basic_mcs_1_4, he_basic_mcs_5_8;
u8 eht_mcs7_min_nss;
int error;
} determine_chan_mode_cases[] = {
{
.desc = "Normal case, EHT is working",
.conn_mode = IEEE80211_CONN_MODE_EHT,
.expected_mode = IEEE80211_CONN_MODE_EHT,
}, {
.desc = "Requiring EHT support is fine",
.conn_mode = IEEE80211_CONN_MODE_EHT,
.expected_mode = IEEE80211_CONN_MODE_EHT,
.extra_supp_rate = 0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY,
}, {
.desc = "Lowering the mode limits us",
.conn_mode = IEEE80211_CONN_MODE_VHT,
.expected_mode = IEEE80211_CONN_MODE_VHT,
}, {
.desc = "Requesting a basic rate/selector that we do not support",
.conn_mode = IEEE80211_CONN_MODE_EHT,
.extra_supp_rate = 0x80 | (BSS_MEMBERSHIP_SELECTOR_MIN - 1),
.error = EINVAL,
}, {
.desc = "As before, but userspace says it is taking care of it",
.conn_mode = IEEE80211_CONN_MODE_EHT,
.userspace_selector = BSS_MEMBERSHIP_SELECTOR_MIN - 1,
.extra_supp_rate = 0x80 | (BSS_MEMBERSHIP_SELECTOR_MIN - 1),
.expected_mode = IEEE80211_CONN_MODE_EHT,
}, {
.desc = "Masking out a supported rate in HT capabilities",
.conn_mode = IEEE80211_CONN_MODE_EHT,
.expected_mode = IEEE80211_CONN_MODE_LEGACY,
.ht_capa_mask = {
.mcs.rx_mask[0] = 0xf7,
},
}, {
.desc = "Masking out a RX rate in VHT capabilities",
.conn_mode = IEEE80211_CONN_MODE_EHT,
.expected_mode = IEEE80211_CONN_MODE_HT,
/* Only one RX stream at MCS 0-7 */
.vht_capa = {
.supp_mcs.rx_mcs_map =
cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_7),
},
.vht_capa_mask = {
.supp_mcs.rx_mcs_map = cpu_to_le16(0xffff),
},
.strict = true,
}, {
.desc = "Masking out a TX rate in VHT capabilities",
.conn_mode = IEEE80211_CONN_MODE_EHT,
.expected_mode = IEEE80211_CONN_MODE_HT,
/* Only one TX stream at MCS 0-7 */
.vht_capa = {
.supp_mcs.tx_mcs_map =
cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_7),
},
.vht_capa_mask = {
.supp_mcs.tx_mcs_map = cpu_to_le16(0xffff),
},
.strict = true,
}, {
.desc = "AP has higher VHT requirement than client",
.conn_mode = IEEE80211_CONN_MODE_EHT,
.expected_mode = IEEE80211_CONN_MODE_HT,
.vht_basic_mcs_5_8_set = 1,
.vht_basic_mcs_5_8 = 0xFE, /* require 5th stream */
.strict = true,
}, {
.desc = "all zero VHT basic rates are ignored (many APs broken)",
.conn_mode = IEEE80211_CONN_MODE_VHT,
.expected_mode = IEEE80211_CONN_MODE_VHT,
.vht_basic_mcs_1_4_set = 1,
.vht_basic_mcs_5_8_set = 1,
}, {
.desc = "AP requires 3 HE streams but client only has two",
.conn_mode = IEEE80211_CONN_MODE_EHT,
.expected_mode = IEEE80211_CONN_MODE_VHT,
.he_basic_mcs_1_4 = 0b11001010,
.he_basic_mcs_1_4_set = 1,
}, {
.desc = "all zero HE basic rates are ignored (iPhone workaround)",
.conn_mode = IEEE80211_CONN_MODE_HE,
.expected_mode = IEEE80211_CONN_MODE_HE,
.he_basic_mcs_1_4_set = 1,
.he_basic_mcs_5_8_set = 1,
}, {
.desc = "AP requires too many RX streams with EHT MCS 7",
.conn_mode = IEEE80211_CONN_MODE_EHT,
.expected_mode = IEEE80211_CONN_MODE_HE,
.eht_mcs7_min_nss = 0x15,
}, {
.desc = "AP requires too many TX streams with EHT MCS 7",
.conn_mode = IEEE80211_CONN_MODE_EHT,
.expected_mode = IEEE80211_CONN_MODE_HE,
.eht_mcs7_min_nss = 0x51,
}, {
.desc = "AP requires too many RX streams with EHT MCS 7 and EHT is required",
.extra_supp_rate = 0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY,
.conn_mode = IEEE80211_CONN_MODE_EHT,
.eht_mcs7_min_nss = 0x15,
.error = EINVAL,
}
};
KUNIT_ARRAY_PARAM_DESC(determine_chan_mode, determine_chan_mode_cases, desc)
static void test_determine_chan_mode(struct kunit *test)
{
const struct determine_chan_mode_case *params = test->param_value;
struct t_sdata *t_sdata = T_SDATA(test);
struct ieee80211_conn_settings conn = {
.mode = params->conn_mode,
.bw_limit = IEEE80211_CONN_BW_LIMIT_20,
};
struct cfg80211_bss cbss = {
.channel = &t_sdata->band_5ghz.channels[0],
};
unsigned long userspace_selectors[BITS_TO_LONGS(128)] = {};
u8 bss_ies[] = {
/* Supported Rates */
WLAN_EID_SUPP_RATES, 0x08,
0x82, 0x84, 0x8b, 0x96, 0xc, 0x12, 0x18, 0x24,
/* Extended Supported Rates */
WLAN_EID_EXT_SUPP_RATES, 0x05,
0x30, 0x48, 0x60, 0x6c, params->extra_supp_rate,
/* HT Capabilities */
WLAN_EID_HT_CAPABILITY, 0x1a,
0x0c, 0x00, 0x1b, 0xff, 0xff, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00,
/* HT Information (0xff for 1 stream) */
WLAN_EID_HT_OPERATION, 0x16,
0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* VHT Capabilities */
WLAN_EID_VHT_CAPABILITY, 0xc,
0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00,
0xff, 0xff, 0x00, 0x00,
/* VHT Operation */
WLAN_EID_VHT_OPERATION, 0x05,
0x00, 0x00, 0x00,
params->vht_basic_mcs_1_4_set ?
params->vht_basic_mcs_1_4 :
le16_get_bits(t_sdata->band_5ghz.vht_cap.vht_mcs.rx_mcs_map, 0xff),
params->vht_basic_mcs_5_8_set ?
params->vht_basic_mcs_5_8 :
le16_get_bits(t_sdata->band_5ghz.vht_cap.vht_mcs.rx_mcs_map, 0xff00),
/* HE Capabilities */
WLAN_EID_EXTENSION, 0x16, WLAN_EID_EXT_HE_CAPABILITY,
0x01, 0x78, 0xc8, 0x1a, 0x40, 0x00, 0x00, 0xbf,
0xce, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0xfa, 0xff, 0xfa, 0xff,
/* HE Operation (permit overriding values) */
WLAN_EID_EXTENSION, 0x07, WLAN_EID_EXT_HE_OPERATION,
0xf0, 0x3f, 0x00, 0xb0,
params->he_basic_mcs_1_4_set ? params->he_basic_mcs_1_4 : 0xfc,
params->he_basic_mcs_5_8_set ? params->he_basic_mcs_5_8 : 0xff,
/* EHT Capabilities */
WLAN_EID_EXTENSION, 0x12, WLAN_EID_EXT_EHT_CAPABILITY,
0x07, 0x00, 0x1c, 0x00, 0x00, 0xfe, 0xff, 0xff,
0x7f, 0x01, 0x00, 0x88, 0x88, 0x88, 0x00, 0x00,
0x00,
/* EHT Operation */
WLAN_EID_EXTENSION, 0x09, WLAN_EID_EXT_EHT_OPERATION,
0x01, params->eht_mcs7_min_nss ? params->eht_mcs7_min_nss : 0x11,
0x00, 0x00, 0x00, 0x00, 0x24, 0x00,
};
struct ieee80211_chan_req chanreq = {};
struct cfg80211_chan_def ap_chandef = {};
struct ieee802_11_elems *elems;
if (params->strict)
set_bit(IEEE80211_HW_STRICT, t_sdata->local.hw.flags);
else
clear_bit(IEEE80211_HW_STRICT, t_sdata->local.hw.flags);
t_sdata->sdata->u.mgd.ht_capa_mask = params->ht_capa_mask;
t_sdata->sdata->u.mgd.vht_capa = params->vht_capa;
t_sdata->sdata->u.mgd.vht_capa_mask = params->vht_capa_mask;
if (params->userspace_selector)
set_bit(params->userspace_selector, userspace_selectors);
rcu_assign_pointer(cbss.ies,
kunit_kzalloc(test,
sizeof(cbss) + sizeof(bss_ies),
GFP_KERNEL));
KUNIT_ASSERT_NOT_NULL(test, rcu_access_pointer(cbss.ies));
((struct cfg80211_bss_ies *)rcu_access_pointer(cbss.ies))->len = sizeof(bss_ies);
memcpy((void *)rcu_access_pointer(cbss.ies)->data, bss_ies,
sizeof(bss_ies));
rcu_read_lock();
elems = ieee80211_determine_chan_mode(t_sdata->sdata, &conn, &cbss,
0, &chanreq, &ap_chandef,
userspace_selectors);
rcu_read_unlock();
/* We do not need elems, free them if they are valid. */
if (!IS_ERR_OR_NULL(elems))
kfree(elems);
if (params->error) {
KUNIT_ASSERT_TRUE(test, IS_ERR(elems));
KUNIT_ASSERT_EQ(test, PTR_ERR(elems), -params->error);
} else {
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, elems);
KUNIT_ASSERT_EQ(test, conn.mode, params->expected_mode);
}
}
static struct kunit_case chan_mode_cases[] = {
KUNIT_CASE_PARAM(test_determine_chan_mode,
determine_chan_mode_gen_params),
{}
};
static struct kunit_suite chan_mode = {
.name = "mac80211-mlme-chan-mode",
.test_cases = chan_mode_cases,
};
kunit_test_suite(chan_mode);
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